I think it's a relative context thing. For example, Hayabusa2 returned an asteroid sample to earth for ~$150M, Perseverance is chugging around on Mars for ~$2.

I think it's a relative context thing. For example, Hayabusa2 returned an asteroid sample to earth for ~$150M, Perseverance is chugging around on Mars for ~$2.9B, Cassini cost about $3.9B (not sure if that's inflation-adjusted), etc. Also keep in mind that the original estimate for the program was under $3.5B. That's a cost overrun of almost 3x, which is generally a red flag.