Lonzo is done. Even if he beats the odds and comes back he won't be the same player. At this point he should probably just take his bag and be happy if he can live a pain-free life with normal mobility.
Lavar never never did any leg strength training to prevent injuries. Just grinded him out year round along with the trendy gimmicky nba trainers. Lamelo is next but he doesn't play defense so he might last longer.
The average NBA career roughly is 4.5 years. Lonzo played on three teams, 5 seasons under his belt. With the 5th season being 2021-22 (35 games), almost half a season. If his career ends, he's almost exactly where the mean is.
Bulls were off to a great start with their three guard lineup and he gets injured and 18mo later the odds of them blowing it up are pretty high.