Exactly. I've gone farther even, and this is my motto now:

    Python 3.6+ or burn it to the ground

I mself still have to port a few projects yet, but those that got stuck in 2.7-3.5 land are en route to dying a fiery death, and being reborn in 3.6+ (3.8 where applicable, 3.6 as the lowest I'm willing to accept).