Hate to burst you bubble. But it has already. The high point of LFS's popularity was before you joined the forum (06). The game for most part been stagnant longer than it's last major update. Development still continues, but it's just maintenance.
No disrespect to Scawen, but his goal to redevelop the tyre physics was a massive undertaking. I don't think it was obvious to him and the community at the time, who were largely blinded by the rising success of the game and it's physics achievements thus far. It's quite obvious now the task is beyond his resources and ability to develop in the necessary time frame, with respect to the millions of dollars and 1000 of hours have been spent by racing teams and tyre manufactures world wide doing the same thing. It's quite possible he will get there, given his past achievements, but sadly it will be too late to matter.
More time could have been bought, had there been content released to fill the gap, but nothing ever eventuated. Reasons for not doing over the years have largely remain the same, despite lacking less and less credibility as time passes waiting for the tyre physics to be finished.
If you like LFS and are still playing, accept that this is pretty much it. If you are looking for something better, then look at long list of alternatives (many inspired by LFS) and have active development and growing communities.