I’ve literally never, in almost 20 years in the industry, been asked to or expected to wear a suit. I’ve never ever had anyone say anything to me about my clothes period. It’s simply not a consideration in my experience. In fact the one time I worked for a place that had a dress code, it specifically exempted my department (software engineering) from the policy - and if that hadn’t been the case I wouldn’t have taken that job.

The real answer here is: know the dress expectations of the place you’re applying to, and consider whether you feel comfortable working for a place that won’t pay you the courtesy of letting you dress yourself.