There have been plenty of satellite price flexibility studies that show there is a marked lag between supply and demand.
This is because high launch costs demand extraordinary levels of design and Q&A: there may never be a second chance. Unfortunately, these supply chains have flexibility baked out for some time, perhaps predating the Apollo era.
Lowered launch costs and increased launch opportunities offer increasing failure tolerance to an increasing number of projects which can now afford second chances and backup plans. However, these corporate cultures take time to adapt, they've been built around single-shot opportunities for decades.
TLDR: satellite markets are anything but nimble at this point, due to historical reasons. This will change, given time.
I don't think it has anything to do with launch costs. Satellites take a very long time to develop, and they're hundreds of millions of dollars. You have one shot to get it right, and lowering launch costs doesn't really make a big dent in that.
Satellites are that expensive in large part because if you're spending hundreds of millions on a launch anyway, you can't afford to launch ten cheaper satellites.
To be a bit hyperbolic: if launches were cheap enough you'd have amateurs launching stuff hacked together in the garage, knowing if they fail it doesn't matter - they can just try again.
I would agree with this if the launch cost was a substantial portion of the satellite. There are a lot more things that play though, especially for Geo satellites. Things like orbital slots are finite, so you really want to make as large of a satellite as possible, which also translates to more expensive. Even if SpaceX gets the launch costs cut in half, that's still not a large portion of the total costs. I believe after all is said and done, the launch cost is still between 5 to 10% of the total costs.
This is because high launch costs demand extraordinary levels of design and Q&A: there may never be a second chance. Unfortunately, these supply chains have flexibility baked out for some time, perhaps predating the Apollo era.
Lowered launch costs and increased launch opportunities offer increasing failure tolerance to an increasing number of projects which can now afford second chances and backup plans. However, these corporate cultures take time to adapt, they've been built around single-shot opportunities for decades.
TLDR: satellite markets are anything but nimble at this point, due to historical reasons. This will change, given time.