Its not easy to adjust status. you have to have a very clean record to adjust status . Even a minor traffic infraction is enough to permanently block u from being a green card holder under work sponsorship category ( eb1, eb2 , eb3, L1 ) etc .

those who are still on tps either didn't complete their degree to get a job that could sponsor them green card or had a criminal record prevent them getting green card . unfortunately its a dead end for most of them. forget about 10 years, they will still be on tps if it was granted for a century under current provision.

A few lucky with no criminal record get away with this turmoil either winning DV lottery or marrying a US citizen , thats it