Over time I witnessed many "new" things, and the ones which stick typically have a specific aura to them, like a 10x simplification, or speedup or reduction in "noise". These things are really rare; most things are incremental and that's good, too.
Blockchain did not seemed to have any of that.
PS. Merkle trees are super interesting and I use them daily (in git) - so all the tech ideas are certainly worth considering, it's just that they are not fit for the advertised purpose plus it has gotten an enormous drag on resources, for nothing.
PPS. I typically have an "tech instinct" to see new things, but I currently cannot really see anything that looks like a major tech shifts from the past. ML is incremental and despite its grande successes is mostly applied by the surveillance industry, which makes it much less attractive. Cloud seems much more profound and the whole apification of the world transformation - although I do not like the centralization, even if it is more economical. In general, the real revolutionary tool or technology does not need to sell itself, it is picked up by the weird and intelligent first, then trickles down to the masses (also: tech can be great w/o mainstream adoption, too - it just not a revolution then).
PPPS: Wild speculation: With 5G, everyone with a phone could host their business directly on their device, instead on other peoples servers. When phones hit a TB in storage, you can run your socnet with your friends - and you probably will, because mainstream money will have moved to something much more immersive, addictive, profitable like glasses, vr, ar.