Many countries have effectively closed their borders, by not issuing tourist/visit visas, or requiring 14+ days' quarantine, often at the traveller's expense.
What happens when your short-term visit visa expires? ... Get an easy extension? Register for 'language school' or other dodges? Suffer a month of quarantine for a visa run? Return to your home country?
Lots of people left but a core of nomads and expats have remained.
They have since slowly begun to dial back the giving out of emergency visa extensions but you can still get a new visa through the normal process. There are even people arriving in Bali recently, on newly-issued visas from overseas.
The scene is obviously quieter here now. There are no tourists, only nomads and retirees who live here.
Honestly it’s pretty nice and I’m glad I stayed.