I'd guess a forward commitment, like a LTS version? That would probably have an adverse effect though, since you'd be the only provider that goes (e.g.) "We will support this product for at least three years from now", implying (to people making Decisions) you'd pull the plug after three years.
Maybe publish a long term (5+ year) plan / roadmap? idk.
Maybe publish a long term (5+ year) plan / roadmap? idk.