That's not entirely true. It's about how you enter the country.Doing it on multiple visa exempts and extensions incl border runs,will eventually get you flagged by immigration way before 180 days. The 180 days limit is tax related.
You can extend the stay year after year.If you want to leave for some reason, you just get a single (฿1,000) or multi re-entry (฿3,800) permit at immigration or at the airport. Dead easy. Then you must return before the 1 year extension expires. Otherwise you need to start all over again.