I don't know what PITA means (English is not my main language), but as someone who has a Samsung phone, and not an iPhone, using the Mac with the Samsung is a real pain. And I have no doubt that Macs are not used only by iPhone users. Personally I have 2 extra SIM cards. One is $5 a month for 5GB of data. I only use for one of my businesses (a dance school) where the iPad replaces pen and paper (with everything synced to dropbox). And another goes either in my 11in pro with Magic Keyboard as my on the go device or on a Windows PC with cellular, when the iPad is not enough. This one is $10/month and it replicates my unlimited data on my smartphone plan (plus 40GB roaming per month). This is some of the money best spent in my opinion.... (Previously I was only using the $10 card but I was tired of switching it so I got the 5GB, which is more than enough for what I need from that iPad).
If Apple made a cellular Mac, I'd definitely consider buying it.
If Apple made a cellular Mac, I'd definitely consider buying it.