I think they are wondering if one extension can use both v2 and v3 APIs at once? As in whether v3 APIs will be "backported" to allow v2 extensions to use them
Excigma
I'm using an app to use my Android phone as a webcam, which works great (good low light performance!) provided I can stand it up somewhere above my laptop screen (finicky). You can accidentally knock it over. Might be worth considering if you don't use the camera much - otherwise an external one will probably attach better and he more stable
Regarding your mouse double clicking, some Reddit users suggest pressing the click button quite hard a few times...
I believe they're available as backup but re-calibrate themselves with GPS coordinates if available. This is not a problem when GPS jamming is used but becomes an issue with spoofing - the pilots need to monitor for it.
I think they talk about it in this video by flightradar24 somewhere: https://youtu.be/4dG_Whxzdkk
re: OneNote
Although not a replacement for OneNote on Windows 10/OneNote in Microsoft 365, you can get Waydroid and run OneNote's Android app with it.
I don't have a stylus so I'm not able to check if everything works, but if it does, it'll hopefully feel better than the web client, which wasn't able to keep up with stylus strokes last time I checked. The number of pens is lacking though, even the iPadOS version is better...
We have a Panasonic inverting one that has a flat bed (no turn table) and it doesn't heat evenly...
It may be possible to get past that, I've seen people disassembling the battery to get the BMC and connecting the DC power supply to that instead.
It sounds way more risky than OP's initial idea. I wouldn't recommend taking apart batteries.