I end up using Shop/Pay more than I'd like but it does make the buying process about as easy as Amazon. I'm to the point now that I just ignore any email from Shop and just wait patiently for my item to arrive.
A minor but useful GUI feature on MacOS in list view is showing the size of directories as well as individual files and being able to sort by those sizes. That extra step in Linux of having to contextually click on a listed directory and choose "Properties" all the way at the bottom of that menu is a minor annoyance
As I understand it, LineageOS does have Google Play Services built in. The microG version is for if you wish to spoof those services for apps that rely on them if you choose to not use actual google background services (location, play store etc)
You can use a Privacy card with any name you want on it although some small vendors with actual people running the purchase process can read and take issue when the "card" is supposedly issued to a "Mybig Blackdog"
I get that too so rapidly lost interest