I like microloading for small body parts as sometimes even 2.5 pounds is a big jump for an arm curl or a shoulder press BUT for a compound movement it doesn't make a lot of sense to fuss such small increments. If I'm stalling at a given weight I need to figure out what my weakness is and use accessory work or change my program to provide adequate recovery time or change the intensity cycle.
5 and 10 pound increments on the squat are as low as I would consider going personally. The difference between 400 and 400.5 is just too small for any kind of practical improvements to my mind.