I so wish that L48 had a thumb. I probably use the thumb on my M59 as much as any other feature on any of our tractors. Don't do much digging with the backhoe, but it's nice to have. Even when not digging, the backhoe is useful as a mobile crane for moving heavy things very precisely... and the thumb helps with that. A lot of what it does is simply the sort of thing I used to do by hand when younger. But now I like some help from a handy small tractor. The Kubota TLB all fit real well.
We also have a full size TLB with a cab. Wonderful condition and only 5800 hours. Yes, it was a good dollar purchase. We got a lot of machine for the money. It is mostly just for backup or very deep snow and cold weather. As far as being able to do work, either the M59 or the JD 310 will do similar work. Usually we end up digging with the M59 and carrying bucket full of dirt and rock with the JD. Small repairs to the JD can be expensive, however.
It's interesting how many of the Kubota TLBs on TractorByNet forums are ending up in the hands of us older guys. A lot of us are guys who are retired on a bit of land and no stranger to tractors - or to mechanical things in general. We know what we like. From the B26 on up these TLBs are just about the best "puttering around" and home project tractors ever. Ruggedly built and can do a bit of everything. If they have a downside it is the price to get into one. Even used ones hold high value. You will probably end up looking for good condition and extras rather than a low price. Nothing wrong with that....
rScotty