I had an iPhone (4, don’t remember if it had usb tethering) but I didn’t even think of it. I think it was Debian 6 the one I was installing and there was one or two people with android phones…but whatever! Walking is healthy, isn’t it?
In the case of Debian I think it is philosophical. It’s been years since I’ve had to install proprietary things on Debian, but they used to be all in the non-free repository that you had to add manually. Honestly I like it, it reminds me I’m putting proprietary crap in the machine. Can be a pain in the ass when the wifi doesn’t work because some proprietary firmware is missing, and the laptop doesn’t have an Ethernet port so off you go to buy a usb-eth adaptor.
PNG is a good format for graphics, lettering, logos… not photography so unless your video is some cartoons you’re using png compression for something is not meant for.
Take this with a pinch of salt, I’m not a programmer just a nerd that likes those kind of things. I tried them years ago first swift (I think it was in version 2) and a couple years later rust, and while both are great I found swift makes it easier to write clear code you’re gonna understand and like when you come back to it. Rust was better I think with concurrency (at the time), you’ll catch everything at compile time, but they talk about interoperability with c++, so this safety will be lost since most code interfacing with c++ will be unsafe.