This is true. He has had other good climbing performances. But like you said, he hasn't yet shown he can cope with multiple difficult climbs in a stage. And this year every time there was a steep climb (excluding Malhao) he had troubles following the best. And I was responding to the poster asking if stage 6 is the best stage for Remco. Stage 6 has multiple difficult climbs, so from what we know now, it isn't the best suited to Remco. I expect about 10 riders to do better than him.
I actually believe tomorrow's stage is Remco's chance. Starting from 70km to go you have 4 climbs in succession, all around 3km at 6%. That's queen stage Tour of Poland territory. The problem is that after the last of those four, there is more than 10km of flat/false flat to the start of the Karabieta climb, which should also suit Remco. So I expect him on the attack tomorrow before the final ramp, which is 1km at 9%. That's Alaphilippe and Roglič territory.
And I don't agree with your statement that we don't know, if Remco is a worse or better climber than Vlasov or Yates. Right now, if we are being objective, it's clear Vlasov and Yates are ahead. You'd have to be a massive fanboy if you don't agree with that. Now, if you take a climb that's perfectly suited to Remco, yes, maybe Remco can do better than them. But in any other circumstances, I take Vlasov and Yates, without thinking twice.
And I repeat, I'm talking RIGHT NOW, from what we know now. We don't know what will happen in the future. I'm not one of those who don't believe in Remco ever improving his climbing ability (to be more specific: on multiple climbs, on long and steep climbs, his consistency during a stage race) in the next years. I actually expect him to become a top10 climber, possibly a top5 climber in the world. I also expect him to be much better in the Vuelta this year already. Like I said a couple of times before. He reminds me of Roglic in 2017 as far as his relation between climbing vs TT vs GC in stage races goes. Roglic also won Algarve easily that year. But when he competed in WT stage races against better competition and with harder and longer climbs, there were always 5-10 better climbers than him. At the time I also believed Rogla would improve (but not by that much to be honest).
Good thing is we don't have to wait too long. Saturday will tell us a lot. Maybe I'm wrong and Remco will be among the strongest. If that happens, I'll happily admit I was wrong.