Thomas rarely speaks in Court but he's a prolific writer. He wrote the most opinions in 8 of the last 10 terms: https://www.scotusblog.com/2021/07/in-barretts-first-term-co.... E.g. 23 last year versus 14 for Breyer and 11 each for Roberts and Kagan.

Which makes me skeptical that your opinion of him is actually based on what he's written. For example, his extensive writing on patent law: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3822741.