Key phrase,no guarantees. Community ROMs are likely to be fixed and stable sooner than official builds.
Having done Pixel Beta's in the past I wouldn't again because of (to me) significant issues. Samsung I won't be doing again because it's the same issues every beta.
Beta's are dirty flash over dirty flash in an endless loop and slapping stable on that isto me like stitching a wound without disinfecting first.
All loops back to your original phrase of willing to start fresh. To me that's a clean flash when stable is released. Not worth it anymore IMO. My days of flashing, rooting, etc.. are probably just over though. I like a fiddle-free experience these days.