Sorry for late reply, I was busy in some work and my typing speed is slow.
Just as I predicted hehehe....we came back full circle to crux of all debate :- Solaris and his omnipresence.
So, they dodge an attack from a temporally omnipresent being. That in itself isn't an Immeasurable speed feat.
It is actually, I'll explain why.
This again, has no bearing on whether it's Immeasurable speed or not.
Well that paragraph was just to establish that Solaris and Sonic have "functionally same speed" for a physical brawl. And you seem to agree , thats all I wanted.
Now I can move on what type of tier is their "functional speed" similar to.
Why is Solaris Immeasurable in speed?
Thats a very important question, one that I expected to be asked.
Solaris is temporally omnipresent, which as a by product gives "functional immeasurable" speed . Technically his "speed" is even superior to immeasurable speed, and has many advantages over it, but that's for another time.
People here that disagree with "functionally immeasurable" speed, give the alternative of MFTL+ with temporal omnipresence as if the latter has no bearing on other.
I'll debunk that notion here and now.
First and foremost it is logistically and logically
impossible for Solaris to have finite speed.
Finite speed is measure of distance w.r.t time.
S= D/T.
And time is defined as
https://cdn.**********.com/attachments/827963339267112970/842976785053777960/Screenshot_20210515-093819_English.jpg
Saying that Solaris's existance and his actions are events that helplessly flows from future to present into past like finite speed characters is quite fallacious. It completely contradicts Temporal Omnipresence. And is an unfair downplay to Solaris.
Giving finite speed to Solaris has severe contradictory implications :-
A) That would mean that Solaris has multiple versions of himself in points of time like us normal humans do , a version of Solaris in every slice of 3D space, and we know 3D space is uncountably infinitismal slice of a timeline, like a numbers on a real line. And each consequent version is just a updated version of Solaris w.r.t time.
2) There is only one version of Solaris and he just updates his version sequentially in each 3D space slice or frame.
Both the above versions contradict Temporal Omnipresence heavily, there is only
one Solaris not multiple of them, He is 4D being, with his size extending accross time from past to the future, his thickness runs from Zeroth 3D space slice to infinith 3D space slice. He doesn't update hisself w.r.t time.
He exists in every point in time simultaneously, his actions happen in all points in time simultaneously, breathing or punching.
Time does not run conventionally for this guy, its non linear, its an aspect of his size, it cannot be used to measure his speed, using time to measure his speed is perfect equavivalent as taking all the distance moved by 3D object in all 3 principle axis (x,y,z) and giving speed like S = x/z + y/z + z/z, see how fallacious it is? Quite literally dividing length and breadth of movement by depth to arrive at speed, or any other variation of above.
Thats why time cannot be used to measure Solaris speed, since its an aspect of its physicality.
Applying Speed formula for Solaris is like
S = T/T, where T is time.
Solaris is a 4D being in a 4D contruct, moving for him in this construct naturally involves him moving in all aspects of its dimension which includes dimension of time, denying him that natural ability is like arbitrarily and unfairly denying a 3D ball its movement in one of the axis and constricting his movement to a 2D plain.
Imagine me saying that you can only move in 2D plane, thats what we are doing to Solaris.
tldr;
1)Saying that Solaris is finite speed is a severe contradiction to his temporal omnipresence,
2) speed formula cannot be applied to him due to being independent of it.
3) Movement in time is as natural for him as movement of 3D object is in depth and height of a 3D environment.
And by process of elimination, we cannot use finite speed as a downgrade alternative for Solaris. It goes against his entire existance.
Since time is undefined for his movements, thats because you cannot measure speed as movement in time w.r.t time, so "functionally immeasurable speed".