The bondtech CHTs and arachne slicer in prusa I assume? That's funny you bring that up as I am testing a .8 cht and 1.8 cht this week on the phaetus Rapido (amazing hotend by the way/faster than others by a long shot).
I main a .6 or .8 now, and only go down to .4 for very small parts that require the tightest tolerances; like the smaller Voron parts.
The trick to keeping print quality is to keep your layer height, as in do not increase it no matter how big nozzle. For line width, about 110% of nozzle size for a little flat squish.
How you determine what nozzle size is by guaging the size of the prints; like wide angle lens, the bigger the scene the wider the angle.
Your cup holders for example, is definitely a .8 or higher job. You can print it with big nozzle in 8 hours, and if sliced right it will be tough to tell the difference.
Also with big nozzles you can go slower but print faster, since you cover way more area witu each pass. This translate into better quality prints with less ringing, from it moving at a much more slow and steady pace.
.4 nozzles are the 18-55mm stock lens on a new DSLR and can get almost any job done, but rarely is it ever the best lens for the job.
I will be more than happy to send you 3 copies for reference; .4 normal, .8cht nozzle and a 1.8mm cht version, I'll get to work on it this week now that I finally enclosed the trident.
