He works on Linux where he controls the whole stack down to the metal and I love that for him, but other people have to call library code, and them debug that if it doesn't work as they thought it would.
I always combine that with objects with the shorthand notation. So you always know what variable has what value without having to remember in what order you printed the variables.
Once you're at this level, you're looking to get improvements of a fraction of a percentage. I don't know the specifics cause I'm not a pro shooter despite being American, but from other high level skill people I know, you hit a point where improvements basically plateau and you have to resort to increasingly niche products to obtain non skill improvements. If you want proof of that, check out calligraphy and fountain pen communities. The amount of money some people spend on things I didn't know existed is wild.
(No bad judgement to those folks, I've gotten hard into map making and 3d printing lately, so I'm right behind you)
Adjustable frames help keep the lens at the correct angle for your eyes if you tilt your head a certain way from my understanding. So if you tilt your head at a certain angle you can adjust the frame to keep your prescription from getting out of focus at that specific head tilt
tfw I recently worked on a side project where I was too lazy to change the log level but not sloppy enough to use raw printf so I'd just throw stuff into info and then remove the statements once I solved my issue