For me inflatable is ok

• put it in a small car
• put it away in winter (exchange with snow shovels)
• Rocks don't matter - river or beach

That may change as I get better and can handle smaller boards. But at the moment I am happy, also soft on the knees for starting.
On the negativ side it does add time to getting ready, but at least you are already warmed up

Before I bought mine (6.0 Indiana) I also searched for info about the boards already available, which were F-one and Manta. Found one experience with the F-one which was not so good (too much flex - but I think that was a version before the rocket). Manta seems OK, at least the small board. My board is very solid but as it is my first foilboard I don't have anything to compare it with. I am a beginner and quite often the only wing on the lake so I don't have to compete with others to have the coolest/lightes gear, and even if I would not care.

New releases will be the Naish and Gong Board. Gong uses a carbon plate to make it stiffer. The Naish looks like they built something inside, maybe like Indiana. My board has a big block inside where the foil is mounted, you see the same in the video when they unpack the board. But according to Gunnar (other Forum) it takes some additional engineering to make an inflatable stiff enough for foiling.