I just wish I had space to set them up permanently. I've had a brief play with the Microdrive, it's a lot faster than the old tape deck. I don't know much about the longevity of the media, though.
Now I want to get the Spectrum out for a play, but I expect I'll lie down until the urge passes!
Thinking I might do a re-cap on each of the machines, two of the capacitors on the Commodore are a little bulgy. It is a 30something year old machine, though!
I understand your tabs behaviour - I am the same, but once when I come to 90-ish, I start culling session to cut it to more reasonable number.