If you ever hear concern trolling about bitcoin's security model (miners stop mining due to low fees and no subsidy) then here's some info to debunk the uninformed, garbage takes.
Miners have many types, strong and weak miners and in Bitcoin mining history, there are many months with Bitcoin miner capitulations that often happen in Bitcoin bear market. Sometimes it happens around a Bitcoin halving when their mining revenue halves in short time while Bitcoin price does not increase two times to cover this subsidy halve.
However in long term, Bitcoin price grows a lot, and with more than 2x after a Bitcoin halving. This helps Bitcoin miners to maintain and even get better income from mining activities too. Surely in anything, there is a lot of competition so as Bitcoin mining industry is, and weak Bitcoin miners will have to leave this business.
Bitcoin block subsidy will not be 0 until 2140.
How is the 21M bitcoin cap defined and enforced?This
Bitcoin Equivalent Time topic can help you more.