[jck]

Oh, and also, if I choose to permanently live in the UK, or EU, the path to citizenship is deterministic with a known timeline.

In the US, the time from Green card to citizenship is unbounded. people from India and China are pretty much never going to become citizens till they exploit some loophole like having an American baby.

[I_AM_A_SMURF]

The problem is getting a green card not citizenship. From a green card you can naturalize in 3 or 5 years.

[jck]

Apologies, you are correct. I haven't considered emigrating to the US for years and forgot the specific details. Most of my recent knowledge just comes from my friends who live there.

Iirc you can indefinitely keep getting renewals on your h1b while waiting on the green card queue - and this queue is many decades long for people from certain countries like India and China.