Not in the conventional sense, no.
I *may* do something in the ceiling down the road, though.
The walls are all concrete block, which helps.
I guess the weak link is the fiberglass door. I really love this door because it's so light I can lift it by hand if need be.
On top of all that...it has 2 man doors, one of which leads to the side yard - actually a concrete pad that runs under the cantilevered section of the house, which was an add on by a previous owner. My thought is to enclose that entire area so the air conditioning in the garage will also flow out into this area, that could be used as a shop.
None of this is super complicated. Just a matter of budgeting the time to do it all. Like everything else we do. The constant shift of our priorities.
But your point is well taken about insulation. It also helps that the garage faces North....