I wouldn't call local Excel/Word/etc "local-first". The "-first" part implies that the network is used for secondary functionality, but the apps you're talking about are fully offline. IMO local-first definitionally requires some form of networked multi-device collaboration or sync.
> Local-first was the first kind of app. Way up into the 2000s, you'd use your local excel/word/etc, and the sync mechanism was calling your file annual_accounts_final_v3_amend_v5_final(3).xls