Theres also no reason to think Reta will stop working, as the body doesnt seem to deal with as much receptor desensitization.
Something I commonly see with GLPs is the idea that you need to be on them forever.
I know people have results they never dreamed of on them - but thats not right. your body not being able to lose weight is either caused by you eating like an asshole and having no self control(which is fixable) OR its because something is wrong with your body and theres a 90% chance there is medication that can fix your body so you dont need the GLP forever.
hormonal issues or metabolic ones have adverse effects on your body besides making weight loss difficult, its better to figure out some of those issues with a doctor so you dont have long term complications OR get tied to being on a GLP forever.