Marketing circles like to declare Facebook dead, which misses the reality of many local businesses. Trades, restaurants, practices, clubs and retail still reach their regulars there more reliably than on any other channel — the user base has not vanished, it has simply grown older.
The effort pays off above all when Facebook does not run in isolation. If you are producing for Instagram anyway, Facebook comes along at little extra cost: same clip, same core text, adapted phrasing.
For businesses in Germany, Austria and Switzerland the data-protection framing matters too: EU servers in Frankfurt, billing in euros with a proper invoice including VAT, interface and support in German.