Zettlr
I don't care about moisture. Those are features that I need on a regular basis.
Carrier locks don't exist in my country.
Mine has an expanding battery and is worthless. I won't be buying this again as it has no headphone jack or SD slot and it's been really frustrating to use a phone without them.
I also didn't buy it from a carrier, and it said it was unlocked, so there was no way to know it would be like this.
Which is why I got it, but you can't unlock the bootloader on mine. I spent hours on this.
The Pixel 2 I got can't even be bootloader unlocked. Bad choice if you want a custom ROM.
I've owned both an X220T and a first generation Yoga. Each has different pen technology, but both worked out of the box on all apps on Linux.
Rnote is a good app for handwritten notes on Linux. Xournal++ used to be the one recommended, but the UI is not great. I still use it occasionally to mark-up PDFs, since I don't think Rnote is quite there on that feature yet.
Nothing quite compares to OneNote for organizing notes, however, since it has built-in OCR and you can search your handwritten notes. Unfortunately, there is no Linux implementation of it that supports inking. I've seen people say that OneNote 2010 works through WINE, but I couldn't get it running. I also tried an Android emulator to use the Android version, but it didn't work with my high DPI display and crashed a lot.
Neither does BC, and as far as I can tell most people in BC also don't consider the prairies to be "the west," so the name "Wexit" is incredibly funny to me.
The swipe typing on the fork works very well. I would advise people to no be turned off by the "experimental" tag, as I have used this fork for a year with no issues at all.
Crooked Still (highly recommend)
The Duhks
Punch Brothers
Trampled by Turtles
My Note 4 died last year so I don't have any android suggestions, sorry. On Linux I like Rnote, but it's fairly early in development and I last time I wanted to annotate a PDF I had to do so in Xournal++
Consider dropping your built-in sync requirement, and use Syncthing instead. It opens up your options.
ADD is just the outdated term for ADHD. One does not need to have hyperactivity to be diagnosed with ADHD; there are multiple subtypes.