Which for here at least produces pretty clean off/on switching. If it's a more than just a small bit of tree that survives the intial contact/blast it'll switch cleaning for two off cycles at about 0.5Hz before locking out. This on/off'ing can certainly confuse some digital stuff.
The only times we have had poor quality power have been when icing brought down the lines in about dozen places locally and the sudden shock loading on some poles snapped 'em. We had roughly half volts until they isolated the supply a few hours later, it was then off for 36hrs until they replaced a pole. Some kit objected to the half volts some didn't.
The other occasion was last month. When they restored the supply after a pole transformer nearer town exploded, they didn't whack an air switch back in hard enough so once it was supposed to be carrying the load it was arcing.
As for monitoring and logs, they quite often already know when I ring up about a power loss but wether that is just from other reports or the recloser automagically reporting in that it has locked out is hard to tell. They didn't on the one above though and I could hear another call in the background "there was a loud bang and smoke started coming from the pole"... I did get verification from the engineers that the reason for our outage was a pole transformer fire. The power just went off in this case though no retry from the recloser so presumably that was an overload trip not phase(s) to earth trip.