As far as I know no solid state boosters were ever re-used (how would that work?) - but then again SpaceX doesn't re-use solid state boosters either (because they do not use any)...
Things can be more complex and nuanced than quippy internet back and forth suggest. That's not even touching on the ship-of-theseus problem that is many former NASA engineers working at SpaceX these days.
Nitpicking of "reuse" vs "refurbish" aside the SRBs were significantly reused:
> The RSRM was designed to make the most use of recoverable hardware. The majority of metal hardware was recycled through ATK’s Clearfield refurbishment plant in Utah and returned to a flight-qualified conditioned.
https://ntrs.nasa.gov/citations/20120001536
The boosters used for the final mission, STS-135, even included parts from STS-1! https://spaceflightnow.com/shuttle/sts135/fdf/135srbs.pdf
Here is a video that explains it in decent details if you are interested, but the TL;DR is that SpaceX is more expensive than the shuttle and way more expensive than they said they would be: https://youtu.be/4TxkE_oYrjU
No it doesn't. The person was trying to say SpaceX > NASA. Many people here are trying to shit on the other side as if they have a real point.
They're both doing cool and useful things and they're both really really good at what they do.
I don't think it makes sense to talk about which is better unless there is some specific metric that can be measured so a conclusion could be reached. I am encouraged though that SpaceX has a trajectory that will allow greater access to space. By bringing the cost of space travel down, I expect we will get a lot more of it. NASA (and other governmental space programs) started the initiative, but I think SpaceX is continuing it marvelously.
Here's a breakdown: https://youtu.be/4TxkE_oYrjU
I watched the first 90 seconds of this. On the cost of re-usability of a falcon 9 point, the figures are shown as from Wikipedia.
So 1) not a primary source. 2) fails to calculate the percentage correctly between $62m and $50m as "around 10%". It's almost 20% on those figures. 3) and most importantly, those numbers are the cost to the customer, not SpaceX's internal cost. As they have no current competition in rocket re-usability, they are able to recoup the R&D cost for developing this technology.
I don't think I'll bother watching the rest of the video.
I can't tell if this is sarcasm or not but... yes, of course NASA developed reusable rockets. The space shuttle missions reused the shuttles and the boosters.