Cross-Platform License (let me play on any device)

I have a PC and a Stadia account and can’t decide on which license to buy. I feel like we should be able to play a game we purchased on any device we own, does that sound unreasonable?

Are there any plans to implement a system like this in the future? It would be really nice if I could play the game with both my friends who play on Stadia and my friends who play on PC.

it’ll never happen because the console makers dont want it. they all keep their systems isolated so that the better system doesnt have a direct comparison and cause people to migrate to that system.

I’m assuming this may actually be a publisher decision more than anything? MS for example has Windows Play Anywhere titles, but BL3 didn’t get included in that either (whereas Outer Worlds did.)