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.
[1] https://control.fandom.com/wiki/Correspondence:_Pinstripe_Wo...