Totally agree. My Badger brushes have their place but I feel my synthetic brushes are a super value and oh so soft.I agree, toothbrushes are the best example of the longevity of synthetic fibers. And while we aren’t scrubbing as hard with a shaving brush, the bristles do take a beating. My oldest synthetic shaving brush is about five years old. It’s showing some wear but only in the sense that it has “bloomed” a little like a badger brush. Regardless, synthetic brushes are an outstanding value. Even your “high end“ synthetic was probably 1/2 the price of an equivalent badger brush. So I say, use that sucker and when/if it finally wears out, buy a new one.