If third party addons can eventually be made for SoW, it would probably be of mutual benefit if other companies could produce SoW-compatible aircraft. Maybe a situation where AI only is available to all, but the flyable/FMB ready version must be purchased. That way onliners could incorporate them.
One area I always thought SoW could exploit is the vintage civil aircraft market that FSX users have traditionally enjoyed. Imagine flying a Dragon Rapide from Croydon to Dover in Oleg's Britain.