I was talking to my dad yesterday and he talked about how he dual booted windows and Linux in his college days. I immediately left to download Ubuntu, I feel so dumb for forgetting it’s an option. I literally only use windows so I can play Fortnite with friends. PSA: you can have both Linux and Windows, or you can use a vm in Linux. Be (mostly) free from Microsoft’s clammy hands.
Many ThinkPad models have a separate extra M.2 WWAN slot for 4G SIM modem, something you can check with respective models’ PSREF sheet. You can put either 128 or 256 GB (whatever specified) M.2 SSD of sizes either 2230 or 2242, which I was able to do on my L470 (a very modern laptop).
On a desktop, it is obviously easy, but on laptops, it depends, but you will find ThinkPads to be the most pro-consumer and pro-poweruser laptops.