There's nothing technically wrong with the laptop either, it's got max RAM, as much as the CPU and logic board will support, the drive, battery and wireless card are all replaceable, you can take out the optical drive and replace it with either one that supports Blu-ray or replace add another SSD, no USB3 ports but it does have Thunderbolt, Gigabit Ethernet, IR for an Apple Remote and an SDXC slot. Apple's just up and decided they're done supporting this laptop from 2012. A few forum posts I saw indicate if you were to force Big Sur on, everything but the wireless card would work. The only major silicon difference between this computer and models that are still supported is the integrated graphics, but without working wireless it's a bit of a non-starter.

I could buy a couple of replacement parts and easily keep this thing going for another 5 years or longer, which I still can if I'm willing to give up on Mac OS X entirely. What I'm probably going to do is keep it going another year or two and replace it once the dust has settled a bit on ARM Macs and Apple has proved they're not going to take their Mac line down a ridiculous direction in the next few years, then maybe replace the operating system and find another use for the machine.

Unless you're pushing the bleeding edge of performance, machines like this are still plenty good, especially if your RAM floor is 16GB. It's not the fastest, another machine I use for work screams by comparison, but there's not really any good reason a 2012 machine couldn't still be ticking along in 2037 if you've parts to service it with. Serviceability is really the only limiting factor at this point. That said most Macs that came after mine lost a lot in serviceability, so that's the caveat.