A lot of recent trends feel like going backwards to grumpy-me as well. Microservices being preached basically the same way SOA was (and falling on every single pitfall again), languages where copypasta and mutable state are "the idiomatic way", HTML inside js code.

Granted, not all recent developments are bad, of course - eg compiled & typed languages being back in "fashion" is a good development imho. It just feels to me we're either not very good at passing knowledge down or just collectively don't care much about learning history to avoid the same mistakes.