I fit integrated downlights if I'm changing them all in a room, especially bathrooms. Not had to replace an integrated unit yet but I've only been fitting them for roughly 5 years. A lot of fitters are buying a spare unit in case of early failure in one unit.
Just check your ceiling height because IP44 is usually enough in most of the room. Above a bath if there's a shower head possibly more but double check.
Yeah just going to bite the bullet and do this.