Honestly, it seems like there'll be many variants in the future, there's billions of unvaccinated people through which the virus can run through and mutate. So I think it's understandable that you stop getting vaccinated once the restrictions are over, but as for me, I'll take the vaccine every year, absent any negative effects.
These last 2 years has made me read up a lot about immune system, and I feel strongly that "letting the body fight an invader when it knows the details of that invader" is better than constantly making the body generate temporary antibodies to fight an invader.
There is less talk in the media about B-cells (memory) and T-killer cells that are part of our innate immune system, as the media seems to be stuck on the initial neutralizing antibodies which wane in months. The 3 doses of the vaccine that we took, is developing the memory and maturity of these germinal centers (B- and T-cells). In the future even if different variants enter our body, the initial antibodies might be evaded but B- and T-cell responses will mount a strong response against all variants of the virus. For this, the body's immune system needs to be strong and this tends to happen in younger people (thats why all through this pandemic, children and young adults were considered low risk because of their stronger immunity). Now with vaccines strengthening the innate immunity more, they should do the bulk of the job.
This is the same as a flu. Every year, there is an annual flu shot thats recommended to be taken and is tweaked per the mutations of the flu virus. I dont take the flu shots at all every year (I took it once rarely back in 2015 or so) and yet I rarely get the flu during the peak flu season each year. The flu virus mutates and they tweak the vaccine every year, but despite not taking it at all, it doesn't affect me. Because the body knows to fight the different mutations using the B- and T-cell responses).
P.s: I highly recommend COVID vaccine for all and dont oppose it (I took it all, including the booster). This is a diff beast to the flu and the vaccine helps the body know what it is. The chances of death are higher in an unvaccinated person, vs. the flu.