`minrelaytxfee` specifies fee rate, not total fee.

Yes, but you are talking about fee rate. Fee is not in fractions of sats 
- By `fee` I mean `sum_of_outputs`-`sum_of_inputs`
- By `fee rate` I mean `fee`/`tx_vsize`

hynek

bitcoin

Is it time to relay even transactions with fee rate lower than 1 sat/vB?

> there's no fractions of a sat possible in a tx

It is possible and happens all the time, as there is no txfee field in tx data structure, it's just (sum_of_inputs - sum_of_outputs) / tx_vsize.