Mostly. There were some old big bulb ones. Not A15 but bigger ones. Not sure why you would do those.
Ours are hard wired so I wanted to have time to tear into and daylight. Our old ones are pushing 20 years and they work sometimes and sometimes they don’t. All different sizes also, pain to get bulbs simce
They are different sizes. New ones have white to yellow light, different levels of brightness and you can swivel the light.
Been there done that last year. 70-something me contorting under the cabinets to put in new LED undercabinets was harder than 50-something me putting in the originals 20 some years ago. Good news was I used the same brand and the plugs for their units, from their junction to the new units had not changed. So, saved hardwiring, was mostly plug and play with a pain in the ass unit mounting.