When poor chemistry is maintained or inferior materials are used the salt often becomes the scapegoat for the blame game.
If you follow TFP recommended levels then you will protect your people, surfaces & equipment whether you have a swg or not.
Use our tool to find ideal chemical levels for any swimming pool. Check TFP recommended levels on pH, free chlorine, cyanuric acid, and more.
www.troublefreepool.com
That swg pump stuff sounds like a marketing gimmick- a pool pump is a pool pump.
I see now you have a single speed pump - so upgrading that to a vsp will serve you well with energy savings & flexibility in operating your swg.
Do you have/ want automation? If so you will need to stick with one brand for your equipment so they can all be connected/talk to each other.
Otherwise some people are brand loyal, some are not. However, since you are replacing everything you may get a better deal bundling vs buying things separately- especially if you need to have it professionally installed which is necessary to get the full warranty from Hayward, Pentair, & Jandy.
Circupool is more diy friendly.
You basically want the largest of everything that you can fit in your space & also afford

*An oversized filter means you don’t have to clean it as often,
*An oversized swg means it doesn’t have to run as much leading to a longer life.
*An oversized heater means more heat in less time.
*A vsp allows for high rpms when needed (like when manually vacuuming) & then low rpms for the rest of the time allowing for energy savings & constant filtering/skimming if you want.