One may have a generic 8-10x30-42 binocular for every use, but inevitably, every use might require different characteristics. That's why I chose not to buy an Alpha segment binocular and follow the Pareto principle, choosing binoculars that give more or less the 80% of Alpha performance and cost around 20% (or no more than 50%). All of you are experts in birding and optics, and I'm not, so excuse me for intruding your Alpha world with humble (I like to say, "Epicurian", though not "Spartan") choices, but this way I can do much more. I currently use (you can imagine the Alpha versions of these if you have the budget):
1. Canon 18x50 IS UD AW 3.7° Porro II: I dislike binoculars on tripods (although I have adaptors for both roofs and porros), so I use them for looking at distant objects, usually ships on the horizon, and also for stargazing, usually star clusters and the Galaxy.
2. Canon 12x36 II IS 5° Porro II: This is a portable option instead of the 18x50.
3. Leica Trinovid 10x42 BA 6.6°: All around binocular at 10x.
4. Zeiss Conquest HD 8x42 7.4° Schmidt Pechan DCF: All around binocular at 8x, my go to.
5. Zeiss Terra 8x42 ED 7.1°: I gave that to my daughter as a beater.
6. Nikon Monarch 7 ED 8x30 8.3°: My portable for years. I used it as an EDC, a tourist bino, for concerts and opera, etc.
7. Zeiss Terra 8x25 ED Pocket 6.5°: My "more portable". I now use it as the above, most of the time.
8. Pentax Papilio 6,5x21 7.5° UCF: My Makroscope, for nature observation (plants, flowers, insects) but also Museums and exhibitions.
9. БГШ 2.3x40 28° CCCP Galilean Binocular: That's my Opera glass and for sky widefields.
10. Docter 8x21 C Porro Monocular 6.3°: That was my EDC monocular and then became a portable microscope with +01, +02, +05 and +10 diopters and stand, when I bought the next one
11. Zeiss Conquest Mono 6x18 T*: My EDC. When there are no binoculars around, I use this. For close-ups also.
12. Seibert Emoskop: Just for fun and mainly as an EDC microscope for my hobbies.
There are also some vintage Pentax and Soviet optics and 4 dioptric telescopes 50-100mm for balcony use (I don't own a field scope).
Altogether, they cost about the same as a 3,000+ euros 8x42 pair that can do less than 25% of what they do (different magnifications, weights, image stabilization, stereomacroscope, microscope, ultraportabilty, widefield, etc).
If I had to buy only one binocular, I would choose a Zeiss SFL (or equal) 8x32, but how much better is it from the Nikon Monarch (or the Zeiss Conquest) to justify this?