... and they geared up for it by releasing two breaking versions in the year leading up to v1.0.0. I managed to catch the entire upgrade path from 0.11 to 0.12 to 0.13 to 0.15. Good times.
It was so fun reinstalling old terraform versions so I could unfuck my cluster infra... not to mention the joy of finding they removed the .13->.14 migration command in .14 so you have to roll alllll the way back... Good times indeed.