SSDs sure became cheap and I agree that the game devs are pulling some heavy bs with that stuff. My rig is all flash based (+ an HDD that is for nvidia shadow play so it doesnt write my flash to death for nothing useful. I won't count that).
But shopping for a PCIe 4.0 M.2 4TB 2280 is very expensive when you compare it to a 4TB HDD or even good desktop 8TB 7200 RPM CMR drive.

Usually my backlog is used enough for me to justify not spending the money on >2TB (anything equal or below 2TB is dirt cheap) TLC drives.

Small addition:
4 TB Crucial P3+: 216€
Sabrent Rocket 4TB Q4 M.2: 280€ Samsung SATA 8TB 870 Evo (QLC): 344€
8TB 7200RPM SATA drives (Geizhals link to how I searched): Anything between 145-250€
(Heavily depending on others factors like cache but still cheaper if you have the patience to wait).
8TB 2280 M.2 SSDs: Starting at 780€.

Yes the costs are coming down and 5 years ago you would probably be ballin to even think about 8TB in flash as a consumer. In another 5 years SSDs may become so cheap per TB that only € per TB would make a HDD feasible until you start to put SSDs in a 3.5" enclosure and arent constrained by the 2.5" form factor. The cost quickly gets out of hand at some point for a consumer just for having to wait 20 seconds to one minute.

Hope I made my stance clear: It's cheap. Until it isn't (for a consumer)