@SkylaneThose were the days. 😅

Agree, establishing domicile is always not than a matter of intent.  It needs to be backed up by a set of facts (the usual garden variety considered by courts and sometimes incorporated in state regulations) that can substantiate that intent, on top of merely a physical relocation.  And special to FL is the formal declaration of domicile - it's probably more widely known in the legal and tax circle but less so to the general public.