They’ve also had a partnership with iFixit for a while now, allowing them to sell genuine replacement parts.
The process still isn’t what I’d call repair-friendly, but I’ve been able to replace the screen of my Pixel 5 without much trouble. What bothers me most is the use of adhesive and too many parts being bundled together so they can only be replaced in bulk.
On the other hand, the time spent uploading/downloading much smaller files probably more than makes up for that, although even that difference might get pretty small with modern internet connections.