Yeah I've had a MFC-L2740DW for something like 7 years now, and it's an absolute beast. It was like AUD$250 or something on sale, does printing/scanning/copying/etc, has wifi, and works on all our devices flawlessly (windows, mac, linux, phones, tablets). I've bought toner I think once in that entire time.
32-bit drivers? Most laser printer drivers are just a PPD file. You don’t need to install any executables or whatever. Heck, on a lot of printers you can just use Bonjour printing without installing any drivers at all!
The cheaper Brother printers don’t have a PostScript engine, so you need a “driver” (really a CUPS filter) to rasterize the image and prepend the appropriate PCL commands. In the official Linux driver package, at least for my printer, this comes in the form of a rather complicated shell script that hooks together some binary blobs, and if you don’t have all the right 32-bit support libraries it just mysteriously fails to produce any output while CUPS reports that the print job completed successfully.
Fortunately someone has made an open-source equivalent which is much less complicated and seems to work just fine.
The printer just keeps working. At this point, I wouldn't be surprised if it lased another decade.