In my eyes, this maturation has come at the expense of the creativity of SCP. Everything feels so sterile now. You have angels, demons, racist monsters that communicate through condensation on windows... SCP, and similar works of fiction, thrive off letting the _reader's_ imagination run wild. In practice, the more you write, the more is known about an SCP, the less interesting it becomes.
The writers of Control knew this. The "Pinstripe World" dead letter[1] is better than any recent SCP I've read, and it's literally just a single sentence repeated ad nauseam. The SCP writers might be better now, but I find their writing much less interesting.
Personally I tend to find the "Tales" less interesting -- the creative constraints imposed by writing everything in terms of containment procedures are where much of the fun comes from in my opinion -- but in general I can't say I agree that over-explaining is a new problem. Finding the right balance of how much to explain vs how much to leave to the reader's imagination is pretty much the whole deal in this type of writing (or horror writing in general!) and not everyone hits the mark, that's been the case all along I think.
The writers of Control knew this. The "Pinstripe World" dead letter[1] is better than any recent SCP I've read, and it's literally just a single sentence repeated ad nauseam. The SCP writers might be better now, but I find their writing much less interesting.
[1] https://control.fandom.com/wiki/Correspondence:_Pinstripe_Wo...