I think those are explanations for why:

1. Bitcoin is great
2. Upgrades are dangerous

But they do not explain why upgrades aren’t needed!

udiWertheimer

Any update or feature that could jeopardize these things, jeopardizes everything. Don't break something that works today because you're responding to a theoretical problem of tomorrow.

bitcoin

Stacker News Roundtable #1 - Building on Bitcoin, Bitcoin Culture, and More

it works just fine today. 

- i can acquire bitcoin without counterparty risk.

- i can hold bitcoin without counterparty risk.

- i can send bitcoin without counterparty risk.

- i can pay with bitcoin because people value it. 

Any update or feature that could jeopardize these things, jeopardizes everything. Don't break something that works today because you're responding to a theoretical problem of tomorrow.