Just like how the Steam Deck was a hype product, the PlayDate is yet another hype product which basically will be used as brilliant paper weight after just 1 hour of playtime.
It's a PC so there's no need for "support" from the manufacturers... at least on windows.
With Linux the manufacturers have to update the drivers. Maybe one day Linux will get a stable driver API?
For once Windows users spent a few days in the shoes of a Linux user.
You could argue they quickly abandoned Steam Machines, but they didn't actually make any, they were just branded PCs (so they didn't need active support from Valve), and barely any sold. They still support the SteamOS some ran on, because the Steam Deck also runs SteamOS.
Remember that it is not mandatory to buy it. You may not like it but some other may do.