Good thought. Yes, I think it could be replaced although the baseboards around the other cabinets would need the trim since I am not pulling the cabinets out.

Yes, it will be a big tripping hazard.

when you pull up the tile and grind down the mortar, you should be able to get your floors level w/the wood. you will need to pull of all the base trim and get winder ones to make up the diff. no big deal. get the same kind of wood and stain it to match the cabinets.

do you know if the cabs were installed on top of the tile? Mine aren't, so if I want to change my flooring, I don't have to worry about height differences.

if you do have a slightly higher step up, even w/the wood, do a transition piece, in the same wood/stain.

The correct way to install cabinets is on top of the flooring. If that is in fact how they were installed it will be challenging to put in a new floor properly without removing the cabinets. This would allow you to make the entire area level, since the only reason there’s a difference in height at all is the stone floor tile was 3/4 of an inch thick and installed without regard for the wood flooring thickness. Perhaps a pro can give you for advice.