Another architect here. I didn't do it yet but I'm really considering a career change. Why? Less exposition to market cycles. Architecture is a _terrible_ field to be during downturns. I passed through one, I won't repeat the experience.
As an anecdote, in 2009 when construction plummeted - downturn is a bit delayed, investors finish ongoing buildings but don't start new ones - the company where I was working downsized from 75 to 10 employees in a few months. In small offices (with smallish projects) was even worse.