"whether this was a sensible thing to consider"
Unless you ride were there are steep undulating hills I really doubt you will get any advantage from a large number of gears. If it bothers you buy a few used chainrings on ebay and see if swapping them makes a difference (I doubt it will). If you do this you will have to buy a new chain too.
2000 Montague CX, I do not recommend it, but still ride it.
Strida 3, I recommend it for rides < 10mi wo steep hills.
2006 Rowbike 720 Sport, I recommend it as an exercise bike.
1996 Birdy, Recommend.
Wieleder CARiBIKE (folding), decent frame.