Correct. Every decent theme and plugin publishes a handful of updates every year. Locking your WP site "in time" is not a viable option. If that's your strategy, just build a static HTML site.
>>josefr+(OP)
Theme and plugin updates keep rolling in.. I'm only locking the PHP version until all themes and plugins the site uses are compatible with 8.
A hosting provider that forces people to PHP 8 is not a good hosting platform for WordPress.