The NC is the heaviest Miata (the PRHT heaviest of all), but owners push back on the 'boat' label, noting the PRHT is only ~88 lb heavier than the later ND RF (2542 vs 2454 lb) and still ~1,000 lb lighter than a Mustang, and drives as a fun, underrated roadster.
The 'boat' / weight reputation is overstated
Mazda MX-5 Miata (NC) · variant