Tbh I want to make everything as efficient as possible and that’s why I want to cut back on water changes.Tbh for the water changes doesn’t take me that much time I made it really easy for myself to get it done, but I like to try new things and see how easy it can be or it can get.
Sounds good, just be aware changes in a routine can cause some imbalances. You've been doing them regularly I gather not doing them could have some type of response. So Just be sure to keep a eye on things in general when making that transition. Most importantly is whatever you do be constant that helps keep things stable and not swing back and forth.
Some have been known to do larger water changes less frequently, with almost equal effect.
Lets Say I do 20% a week l, if I do a larger one %80 one once a month instead it could actually balance out in the end. Just find a routine that you can work with and kinda make it a mission to stick to it for the most part.
Those were only examples above.
There are definitely some that keep thriving and vibrant reef tanks with zero water changes and they make it work as well. Though they likely run icp tests regularly and dose individual traces. (A different way than most but they are constant with their approach)
On the flip side there or some who also claim they don't do water changes ever and meh their tank looks like ----- or it works for them right up until it doesn't. Things build up to a breaking point their tank goes south and they get overwhelmed and probably quit.
To be clear I'm not trying to steer you in any direction only encouraging you to find a method that you can and will keep constant with to keep things stable longer term.