Hi,
It also took me exactly a year to realize two things:
-A fully featured eurorack format sequencer module is very expensive and large, which brings me to my second point.
-Case space is very valuable, if you want to keep a reasonable case size (9U for example).
Before starting with modular I already had an Arturia BSP and it works very well combined with Eurorack. You can use it via MIDI with a converter module or use the dedicated outputs directly with patch cables, like I'm doing.
This also applies to percussion modules type TipTop 808-909, without modulation.
For the price of 3 of them, you have a good external drum machine.
However, the percussion modules with several CV parameters, those do make sense to include in the rack.
Best regards,