I'm in an interesting situation on CA2, where I basically own all the ships I "need", along with a functional hub to refuel and repair them, but I still get the itch to build more. I've got about 3600 PCU available after trimming the fat from some of my ships, but this includes purposefully gimping my ships a little bit (removing doors that are more cosmetic than functional, for example). It's not enough PCU to build another high-level ship or base, and I like having some spare PCU for things like advanced weapons (guided torpedoes and drones).
My first thought was to use my wife's account to double my PCU by signing her up to my faction and playing as Jenny to build new ships and bases for Duck (faction shared). I may still do this just to have a bigger PCU buffer (Keen's limitations are ridiculous and almost everyone is using alts to circumvent this). However, it dawned on me that I could just run a new "save" on a different server, using that "save" to explore different gameplay options. For example, my current setup is a fleet of three smallish ships - an explorer, a gunship, and a miner, along with a small starbase of sorts. On my new "save", I could instead focus on having one larger multipurpose ship with a hanger of SLFs and SRVs.
The advantage of running two saves is that not only do I double my PCU, I also double my world size in a way, since Earth 1 will be different than Earth 2 regarding who's there and what they have built. The disadvantage is that I have to start from scratch, but as others have said, some of SE's best gameplay is the early gameplay.
This idea popped into my head when I recently visited CA1 and found it to be running at full speed. It used to be that CA2 was the only fast Keen server I could find, but they must have done something to fix their servers in general. Despite the limitations to Keen's servers, I haven't found a private server that I like yet, so official servers remain my go-to for now.
Anywho, just thinking out loud. I still have things I'm working on with my current fleet on CA2, and I definitely will not be abandoning CA2, but I may be running a parallel operation on CA1 this winter if I find that I have a new ship / station / base that I'm itching to build but cannot afford PCU-wise.