Is it generally best practice to connect to fewer, rather than many relays?
Discussion
It depends on what the relays are, what you want your outreach to be, and how much data you are willing to consume on your internet. For instance, if you buy access to nostr.wine, it is a relay that aggregates a lot of popular relays, so getting nostr.wine alone will cut your necessary relay list in half.
To a certain extent, many users including myself, would say that the number alone is inconsequential. There was a point where I was connected to 20 relays at once, which is common.