Whenever I see systems like this I am left wondering what people do on mobile? Are you never in the need to write a note or create a task when you're away from the computer?
I use a small notebook and Fisher Space Pen. To be honest, it just feels more comfortable with the way my brain is wired. I tend to remember things better when I write instead of type, and I jotva lot of stuff in the margins as thoughts start to flow, where others might find note-taking apps more suited to their style. It really just depends on how you process information.
I'm the same way but I use a hobonichi journal with a frixion erasable ink pen. It flows much smoother. I used to use a moleskine with fisher pen but I kept having to go over lines again. Maybe it works better in space.
If you're already using the frixion pens, you might like rocket book notebooks as well. They work with the frixion ink so that the pages wipe clean with a damp cloth, and there's also an app that will scan your notes to your cloud storage or email.
I used to use rocketbooks back in school, and they were quite nice. This was a few years ago so I can't comment on it now, but I really enjoyed it then. You could setup various places for it to save to and there were boxes at the bottom of the page I could check and say the first box was checked it got sent to drive, the second box could be like dropbox etc I had all mine set to different google drive folders for my classes. It was able to scan everything quite well and was honestly pretty seamless to me. I feel like there were more features but I can't remember now, even if there weren't though I still liked the organizational structure of it all.
I haven't had any issues with residue after a lot of use. The only thing to watch out for is writing too hard and leaving a scratch in the paper, but that's easy enough to avoid.
I have an Obsidian vault synced using Synthing. At first I thought that Android would kill the Syncthing background process all the time, but it's been fine so far (I do have to launch Synching manually after restarting my phone).
I don't use any of Obsidian's fancy features, apart from tags and the occasional note link (so that I don't have to copy-paste a reference from another note).
I use the "daily note" feature if I want to jot something down quickly. I then formalise it later and when I'm at my computer, I check in the markdown files into git with a script that modifies the timestamps of the commit(s) to match the last-modified date of the files I'm checking in. This is so that I can know exactly when I wrote down a note, so that I can correlate the commit with other records like my browser history.
I switched to Joplin for this reason. I used to use git + text editor, but it's not the best experience on Android, and seemingly near impossible on iOS.