In answer to your question: certainly.
First of all: the sample volume, total number of microwave lines and resulting cooling power have all been massively increased in standard dilution fridges so that the modern quantum computing experiments can fit in. Even if you don't care about phase qubits, but are interested in something else that needs to run at mK temperatures, you're going to have a better time now rather than 30 years back.
More importantly though I'd say isolation has drastically improved. Even at 4mK you can get infra red photons breaking apart Cooper-pairs: forming additional quasiparticles. That noise interferes with any qubit in the fridge. These infra red photons were originating from the fridge itself before this issue was fixed. We would never have identified this issue without studying the high sensitivity of qubits to quasiparticle creation.
Finally, if you don't think that these advances are significant enough, then I don't think you're just having a dig at quantum computing, you've got an issue with the progress of science as a whole.
You're right: I have an issue with the progress of science as a whole, though I particularly take issue with "quantum computing" being considered science or technology or much of anything beyond play acting with liquid nitrogen. On the upside, nothing I learned in school is likely to be out of date ... for the rest of my life!
For the sake of lolz, please characterize this massive increase in cooling power using ratios. I could have missed something.
FWIIW I sat next to a dilution refrigerator in a lab in 1991 -can you name any significant improvements in them which came from QC funding?