My best guess comes down to two factors: software and the Internet.
1) Software: Designers are using the same tools, which exert the same unconscious forces on their creative process.
2) The Internet: Aesthetic diversity is bound to fall in such a hyper-connected world.
“We are all agreed that your theory is crazy. The question that divides us is whether it is crazy enough to have a chance of being correct.” — Niels Bohr
Since I’ve been asked a lot:
Buy stock in several companies that make products & services that *you* believe in.
Only sell if you think their products & services are trending worse. Don’t panic when the market does.
This will serve you well in the long-term.