Thus I have some "angle grinder flour" to pickup :-)
Bagged vac? Karcher seem to be just a big bag, a bigger version of my old Miele w/ generic 5L bags.
Cyclone vac? Plenty of cheap £20-30 cyclones which in theory avoid bag-burst & bag- fills-in-seconds.
Aside, Screwfix Titan 5" 1010W 29.99 angle grinder a) eats switches b) shorts out to the blade with a long flash & b-b-bang. This was dicing 2.5"x1" aggregate-screed to 20-25mm depth over 2.5m^2 with a Marcrist BF850 super fast quiet disc. Flooring asphalt of 25mm above was cut with an Erbauer open segment disc then levered up without much ado.