I recently came back after a half-year break, with a bucket of reviews waiting for me (although, at level 23, it was undoubtedly much less than yours must be!). I had definitely forgotten a bunch of stuff, but instead of resetting back down, I just ploughed through those reviews over the course of a week or two, not taking on any lessons that might unlock in the process.
I also used another @rfindley script, [Userscript] Burn Manager (Review / Resurrect / Retire), to unburn things that the Self-Study process (using the script @LucasDesu linked to above) showed that I’d forgotten.
The end result was a metric ton of items moved out from burned, enlightened and master back down to guru or apprentice. I still didn’t do any lessons, trying to get my apprentice and guru item counts down to a more reasonable level. I also know that eventually I’m going to get a huge pile of things to review at once for enlightened and burned respectively.
But I am really glad I did it this way for three reasons:
I only remembered about 40% of the stuff in the review pile, but the stuff I did remember was from all over the place. I’d forgotten some level 2-3 stuff, but remembered some level 18-19 stuff. This way, my review pile quickly became a focused set of stuff that I specifically needed to look at again, rather than the general WK ordering that doesn’t really match what I needed, which was to relearn, rather than learn for the first time.
Most of the things that I’d forgotten, I only really needed a one-time reminder, and they were back. Future reviews for those items were solid again quite quickly, and the review pile became even more focused to the stuff I had forgotten more completely.
Once I had my reviews under control, and I had levelled stuff back up, I could immediately start learning new things and moving forward, instead of being stuck back in reset world.
I know it’s a whole other level of crazy to do this at level 50, rather than 23; and after a year instead of half. But I’d recommend trying it - you might be surprised at how much you’ve retained from different levels. Spend a month or two on those reviews and you might get back on track faster than if you reset back.