Jokubaitis is very good, but he has to play so more or less the whole season to make this question reasonable that is very unlikely to happen . You tend to overrate current youngsters (like you've done a lot with Sirvydis, Kulboka, Velicka and etc) and to forget a little bit how good were some from the past. Macijauskas at that age was already a tremendous shooter averaging in Rytas (and that wasn't a current Rytas) 18 pts with a huge over 50% 3pt shooting. Nowadays you almost can't see such numbers from anybody at any age. Who can surpass it? Realistically no one. Macas was too good. The only one name in my head is S.Marciulionis. i didn't see him in that age of course, but in about 2 years from that moment he was a USRS top scorer in EC taking silver and being named the 2nd best player of the tournament Galis being the 1st...Again, not imaginable today.
FOA, the off topic that you threw. How I overrated or overrate Sirvydis and Velicka? (I partially agree that I overdid with Kulboka in 2019/2020 season, but nevertheless he's still legitimate prospect).
SOA, I wrote it's rhetorical question, unanswerable. Why it's reasonable to ask this question already nevertheless? Because no-one at this age saw such level. As 20yo he already showed huge flashes of talent playing for EL contender, last year's EL finalist. That's the main reason, but it's also the reason why it's rhetorical. We have no comparisons of such cases. We don't know how Macijauskas, Siskauskas or Jasikevicius would adapt to such environment, we can't make this hypothetical turn. Even if Rytas was a hell of a team back than, the gap is still enormous, specially with Saras who punishes you after first harsh mistake. BTW, I exclude Rooney. In his prime he was the best Lithuanian guard, but not early on. Last week I watched couple of games of 23-24yo Marciulionis balling for Statyba and he was still wild player, a lot of crappy decision, misreads and so on. Terrific roaring athlete who dominated Soviet league off course, but nevertheless even 24yo Rooney was not even close to Jokubaitis decision making and thus I would have a lot of doubt Rooney could adjust to elite club early on. What you overlook (seems so) is Jokubaitis unprecedented maturity for such age. He literally steps on the court and legitimately run and very often lead Euroleague's contender, Barselona. There's no tiny drop of quality felt when he steps on the court, actually contrary, he has been the best guard along with Higgings for Barsa thus far. His decision making startling, he understands where to attack where not, his control of the pace and he has been shooting with great % both EL and ACB.
I don't know the answer, I very well know what kind of beast was Macijauskas, I miss such players so much. But I argue that
elite EL basketball wise Jokubaitis may be the most matured and most ready 20-21yo Lithuanian guard ever. Even if numbers are important and you right that it's premature question a little bit, but he already has tools to play at such level, it's obvious. Did 20yo Macas, Saras, Rooney, Siska already had experience, IQ and decision making to play for EL contender? We don't know. While Jokubaitis has been delivering. Don't forget that he was really good all preseason long as well.