I took a few years off for life reasons, myself, and like you, I decided to move to smaller batches when I came back. So I now do 2.5g Biab batches on my stove. I like that the equipment is very simple, and it makes it easier to fit in a brew day. Plus I have more variety of beers around. I just use a cheap 5 gallon stainless pot (the kind you can find as the very basic option on any homebrew website) and a nylon grain bag. It's worked great for me, even for big beers, including the time my scale broke and I accidentally doubled my grain bill!
Since coming back to brewing a couple years ago, I've focused a lot of my time and equipment investments on the cold side. Got a mini fridge for temp control in fermentation, and I modified the lid of a 3 gallon fermonster so I can do closed transfers to a keg. Also got some stuff to do yeast starters and an oxygen wand for oxygenation wort. All that stuff combined has really improved my beer. And it's all much easier to accomplish for a 2.5g batch, in my opinion. In the end, I'm happy I took a brewing break because I don't know if I would have downsized my process had I continued on as I was going before.
Welcome back, and happy brewing!