I'm merely an observer, but it feels, intuitively, that HFT was great when things were fairly predictable -- or more like the major indices and individual names moved a most 2% on any given day -- and now, in the post-covid era, starting with the DPZ spike, and you could argue the TSLA original call buying spree, everything is in shambles. A lot of HFTs I know of suffered serious losses...
Could you explain, indirectly or without identifiers, why now is different than back then?