See, to me, collecting 100 coins, for the most part, was an issue in SM64, there were too few on some stages, and you had to defeat several enemies just right, among things. Literally, I gathered 119 stars, and then got stuck in Tick Tock Clock (or whatever it was called.) I just couldn't do it. I had to borrow a Gameshark, and literally cheat.
In most cases, it was less a pain in Sunshine, by virtue that I don't remember any major struggles for coins there, at least. If there were enough coins for a hundred coins to be found easily enough, and earning 100 coins just means you discovered every hidden place and grabbed a handful of coins while you were there, that wouldn't be a problem. The problem was that often, one wrong move, and you had to start over with several difficult trials, and it just got to be no fun.