Why not? Personally i believe a hardware manufacturer should be bound by law to sell parts for any vehicle it sold in the past, as long as it exists. Yes even if it was produced 40 years ago. There's no reason for it to be otherwise.
If this was mandated by law all the tiny incompatibilities that they introduce with very varied models will suddenly go away because they'll be careful to make products that can actually be maintained and repaired decades from now with spare parts compatible with different models.
Some people use cars who are more than 50 years old and they're just fine. Same goes for washing machines, drills, bikes... We have to stop this capitalist nonsense that keeps on producing single-use items that end up in the trash in the coming months. IT'S INSANE!