I can join the crowd now too. 122k miles on my 2008 LX570 and I have a hairline crack in the same spot everyone else does. Ordering a new radiator tonight and going to take a peak at the complexity of the starter and water pump replacement and may preemptively tackle those. Hard for me to find a day to devote to wrenching so I’d rather knock everything out and have peace of mind for another 100k.
Did your coolant started to leak? Wish I had the time and patience to wrench everything else myself.
From what I hear, the starter is a pain. Something about needing to remove the exhaust manifold, etc.