Available in white and black (or dark brown) and 4 or 6 terminal versions.
Now, you have those, all manner of cute enclosures, Wago terminals, DIN terminals, Wago DIN terminals.
Waterproof ones, ones with cable clamps, ones that will fit through a downlighter hole...
Some of the products are very nice - and if you are like me, you are always seeking to "make the best choice" - the most robust product, easiest to work with etc.
It's a good thing - but instead of just getting on with it, people like me spend some time reviewing the options, unwilling to choose the least optimal for an installation that might last 40 years.
That's a very specialist area. Now multiply that into every area of your life.
I had a plumber in the other week to fit a couple of bigger radiators. As one has to hang partly on plasterboard (sheetrock), I gave hime some of my favourite fixings:
He's never seen them before - but was hugely impressed. Doing some carpentry? Used to be: "Screws - number 6-14, brass or steel, countersunk, raised head or roundhead.
By god, look at a screw catalogue now - there's a screw for every occasion.
So yes, it can get stressful, if you care and are an "optimiser" like me. OTOH, I don't care what bread I buy - if it's crap, I 'll buy a different loaf next week!