I think I was at my most creative and prolific around 20 years ago, with my best stuff being released around 2007-2008. I started dabbling with Cakewalk around 200, which later became Sonar.
But then Sonar took a direction that really messed up my workflow.
But not long after I suddenly had an unrelated career.
And then I had a family to take care of.
In other words, life got in the way. Plus I had permanently migrated to Linux, and despite many attempts I couldn't quite get into it.
However, thankfully I found Bitwig, and I feel like I'm not at a place where I can start doing it properly again. But of course, all the synths and plugins I used way back when are probably out of date. So any tips for replacing these?:
Native Instruments Guitar Rig - Guitar effects and processing
Edirol Orchestral - Orchestra oriented softsynth
Steinberg Hypersonic - general purpose softsynth
Drumkit from Hell - Drum softsynth
Also, is there anything new in terms of tools, techniques, and processes that have emerged during the past 20ish years I should be aware of?
If you have bitwig, you really don't need much else. Other things can be nice to have, but focusing on new gear/software is a never ending rabbit hole that has a near-complete reduction in productivity at the bottom. Bitwig's included synths, samplers, and effects are WILDLY powerful, and you can do basically anything you can do in any other synth, with few exceptions.
I would focus on trying to make specific things. Like, try to recreate a section of a track you like. If you can't see an obvious way to do a specific part in bitwig, look up a tutorial, or download a sample. That way you'll focus on doing stuff you like, and on learning how to do it better.