If it sits for spells with no use keep a maintainer on it

I literally just replaced all four of our vehicles batteries this fall. I always go “up” in the cold cranking amps when I can especially for my truck. Just seem to do better in our winters and summers. My wife and two sons’ vehicles all have that feature where the motor shuts off at stop signs then restarts when you press the accelerator. Im not a fan but they like it. Those take a slightly different battery than standard options.
I think avg life I get is about 4-5 years before they start acting up. The OEM batteries when we bought the vehicles never seem to get that long a life. When they start acting up at starting, replace them as soon as you can. No fun to be stranded somewhere and when they go bad it seems to be when you need the vehicle to start and get you there in a hurry.
Our boat has 3 marine batteries and I will always get top of line and max cranking life batteries for that thing. Don’t want to be stranded out somewhere if I can prevent it. The trolling motor takes two in tandem (24 volt system) and we plug in charger after each use. I have a battery tender too. In winter I disconnect all leads to the boat batteries and winterize. Everything contact point wise gets a good dielectric coating. Seems to help with corrosion prevention, same on our vehicles. The vehicles don’t sit much seems they all get just about daily use.
Good batteries are important and I know they are expensive but when it hits 20 to 30 below here I want my family to be able to start their vehicles and not fight issues because I tried to cut a corner on quality or push the average life a little too much. Same in summer…a run of days in hundreds can be just as hard as extreme cold, I believe. It’s about safety in my opinion.
The OEM in my GMC Sierra 1500 only went 3 years before it started acting up. Got four years to this fall out of an upgraded replacement. Will see how many I can get out of this new one. So I’m 7 years into this truck, bought it new, and hoping to get another few years out of it yet.
Tires and batteries…expensive but I rarely put OEM back on anything. I need better traction than most OEM tires, and I certainly need better cranking amps in batteries too.
Jim