My answer is a bit of a cheeky one. My main table is an SME Model 10. I replaced the M10 tonearm with an SME V.
Now presumably for many people a second table is a cheaper one, or one using, say, a different drive (belt vs direct vs idler for example). I'm totally happy with the Model 10. So what did I do when I decided I needed a second? I bought a used Model 10!
One will be home to London Decca cartridges, which will no longer be repairable after November 2022 when John Wright plans to retire. The other will be home to my other cartridges, and used to prolong the time before I wear out both the Deccas.