Steam

Not many tools supported out of the box. Its beauty comes in its modularity, so anyone could have always made an add-on - but that takes time and money, what most small devs don't have (but Sega and Tesla could).

Then more recently the devs have had time, and so could make these first-party - and very recently much more stable long term funding, so I'd expect these tools to improve rapidly.

All that being said you could toss a 20 million polygon default cube in UE5 and it'd look/run pretty good