Spain has dominated group 4 in the UEFA Nation league as they have been unbeaten in that group as theyhave won switzland who are in button in their group by 3-2, if Spain hadn't qualify I don't think they will gamble against Switzerland by only winning with low goal margin.
Spain has been outstanding in group 4 as they have won all 5 matches if they should continue this way they will definitely go far in the league if not even playing final.
Spain is a team that their future looks very bring. If you look at the team that finished the match, only Fabian Ruiz was a starter for the team. They have built a very solid team and are looking like the best team in Europe. They were without Rodri and Yamal, yet they were very fluid.
They have built a team that can win the world cup and can also wi the Euros again.
The good news is that the young players like Yamal and Cubarsi would have matured enough and gained experienced before the next world cup. They really have a shot at repeating what the peak Spain did from 2008 to 2012 and I'm looking forward to it to see if they can replicate it.
There is still enough time before the next euros and before then many things must have happened to this Spanish team. Moreover it is not always easy to win an international tournament back to back. Before that time some of the players at their peak now might have lose form and won't be at their best performance by then. The more realistic competition for Spain to win now is the world cup and I believe that's where they have set their sights right now. The world cup is closer than the next euros. This present Spanish squad looks likely to be playing together till the world cup, but I'm not sure they they will be together till the next euros. I can vouch for Spain to win the world cup than winning the next euros. I'm not saying it is impossible for them to do it, but in my assessment it won't be possible.