Except nobody looks at it as their u20 season, they go by draft year. And their D+1 years are similar.
In 15 years nobody looks back and says "man look at this crop of u20 players back in 2019", they say "look how loaded this 2018 draft is"
I mean, I'm not even entirely sure what "his U20 season" is referring to, considering the "U" simply means "under", and every season Lundeström has played so far has been a "U20" season. I imagine here it's supposed to only mean "season featuring the final year of U20 WJC eligibility", but that's not exactly intuitive and in my personal opinion it's kind of pointless to introduce (or at least apply) an alternative cut-off date from the draft when talking about draftees. Whatever, though.
Excited to see what Lundeström will show next season. I wouldn't feel comfortable putting a 3rd line ceiling on his offensive upside, personally.