Ref the "can get chips on the tool flange" - I have never seen it or ever had it happen. I have read it here - many people have posted that it happens though.
On the Robodrills i had, we had a big issue of chips getting on the holder tapers, because the clock face toolchanger was open - and when you're routing with a knuckle cutter throwing mince meat everywhere at 200"/PM, it did get on them.
And then toolchange and trap in the spindle taper and scrap the part because tool length etc...
So, we got a tech in who prolonged the toolchange time on the Robos - The head would rise removing the holder, index to new holder, lower and then at 10mm from the end of cycle, it would pause for 1x second so the internal airblast would blow chips off the taper, then finish the toolchange.
Worked like a champ.