The drugs a specific person is taking today will be effective forever as long as they take them every day as prescribed. Hiv mutates when doses are missed or you take less than 3 drugs to combat it. There exists no future in which hiv drugs we're using today suddenly become ineffective.
A subset of the population will become resistant to certain classes of drugs, because people do stop taking drugs etc. And gain resistance, then pass that on, but for a specific individual their current regimen should be good for as long as they take it. Realistically people change drugs every so often as better drugs with lies side effects are released, but not because of new resistance development.
Now this did used to be a bit if an issue since people had to take multiple pills at different times a day. Having to do that makes missing doses easier, and then resistance can develop. But these days most people are on a single pill taken once a day that completely eliminates that risk.
You're thinking of this like antibiotics, when it's really not a comparable situation.
A subset of the population will become resistant to certain classes of drugs, because people do stop taking drugs etc. And gain resistance, then pass that on, but for a specific individual their current regimen should be good for as long as they take it. Realistically people change drugs every so often as better drugs with lies side effects are released, but not because of new resistance development.
Now this did used to be a bit if an issue since people had to take multiple pills at different times a day. Having to do that makes missing doses easier, and then resistance can develop. But these days most people are on a single pill taken once a day that completely eliminates that risk.
You're thinking of this like antibiotics, when it's really not a comparable situation.