Then there are 'Run on Sequences'. Prog is where this is most prevalent. I like Dream Theater, but?
Sequences should be three laps max. or they're too long. Repeating it over and over in every key and back is horrible. There are 20 minute prog epics where if you cut all the sequences down to three laps, there is only five minutes of music left. Ok Vivaldi can be guilty of it too. Bach knew that too much use of them also was an issue. Look at Well Temp Klav. Book 1 has lots of sequences, part of the charm. None of them are run ons though. Book 2 has considerably less sequences, which to some, makes it less appealing. Later Bach, like Art of the Fugue, has almost none. The more mature use of sequences has each lap altered a bit.