I spent a lot of money buying stainless steel bits, mostly 5" for my Anglo-Arab and 4 1/2" for my Arabians and my Paso Fino mare, plus a few 4 1/4" bit for my kid’s POA.
Then I spent even more money getting all the Fager bits that might work with my hand problems in most of their sizes. I just ride lesson horses now, which means that one week I could possibly ride a horse that NEEDS a 4 1/2" bit and the next week ride a horse that NEEDS a 5" or 5 1/4" bit. I’ve bought the bits whose mouthpieces look promising for working with my hands now that I finally KNOW what works with my hands.
Due to this bit hoarding habit my riding teacher uses me as a bit bank for stainless steel bits and the titanium coated “rainbow bits” I found on-line around a decade ago. It sure saves her the expense of buying a different bit when HER bit library does not have what she needs.
One day when I was collecting stainless steel double bridle bits of all sizes I ran into these super, super cute little 3.5’ and 4" Weymouth curbs and bought them. I showed them to my riding teacher and she immediately borrowed the 4" one long term for a super pesky 12 hand or so lesson pony she had gotten that never, ever wanted to obey his snaffle bit.
Years later this is still his bit for riding lessons.
Plus the multitude of bitless bridles of various styles and sizes that I might really NEED one day if I want to go on riding if my MS gets a lot worse.
Did I waste my money? Possibly, but I never worry about having a bit that a horse will like enough so he/she consents to obey my rein aids.