Yes they do fit in the same socket. I have been using them for over 3 years now, and the reason I started to use them was because I was tired of replacing the regular bulb every 2 month even when I turned the lights off when I did not need it
CFLs don’t last long with lots of cycling. One I installed in my upstairs hall only about 2 years. I have an incandescent bulb in my downstairs powder room (a large globe type) that has been there since 1986. CFLs don’t work in light dimmer or photocell controlled circuits - ruined a couple trying, without reading the fine print. Lots of places where CFLs make good sense to use, have them in many places - but there are some lighting solutions that call for incandescent bulbs. If this country were free, we wouldn’t be dictated to by our elected reps to use low flow toilets and CFLs, under threat of force.