I will say this: SCP's problem has always and will always lay in it's public format-- much as I do genuinely like some of the stories in it
SCP-4975 is a Euclid-Class SCP originating from Germany, having stalked victims and having multiple nursery rhymes and folk tales written about it. Tier: 9-C Name: SCP-4975, Time's up Origin: SCP Foundation Gender: Unknown Age: Nearly 500 years Classification: Euclid-Class SCP Powers and...
vsbattles.fandom.com
see this abomination I call a profile
But at the same time being 3 steps from outright Public Domain that everyone can add to if they format it well enough will eventually lead to people going for big tier because that is "based"... and that's the problem. There have been too many of those people and some are quite well-hidden, While nuking Extended Canon alone sounds like a good idea, that's just going to result in a billion low-quality CRTs including "Why no this thing on profile???" In worse English then I just used.
In short: it's not worth the headache of keeping around at all, restricting it to Article Canon or not.