We COULD have lead free skies in regards to aviation sooner than 2030 if the powers that be wanted it that way.
Unleaded GAMI fuel is only a heartbeat away. In fact, it IS here. Swift UL94 is already at LGB.
In this article, GAMI Founder and head engineer George Braly dispels the rumors, innuendo, and addresses the questions about G100UL.

GAMI Answers G100UL Criticisms Point By Point

GAMI founder George Braly offers responses to a series of criticisms and questions about G100UL, his company’s unleaded replacement for 100LL.

The City of Long Beach and LGB have put in place a couple of incentive programs to get pilots to use the Swift unleaded 94 octane fuel that is currently available at LGB. (see here, and here)
However, based on reports by the airport, no sales of this fuel have been reported.

What will it take?