Spain might be the strongest team in the next 5-10 years because their squad are full of young players and these young players already able to compete with the senior players. Currently, France is the strongest team, they have full of star players, in prime ages and have physical advantages.
Props to Switzerland, it's quite surprising, even they don't have star players, but they can compete against strong teams.
Spain managed to get a lot of good players, and they should be thankful to Barcelona once again, they are bringing in so many great talented young players, mainly Yamal that kid is basically 15 years of right wing for Spain that is not a simple thing to achieve and they did that, which is awesome and I believe without a doubt the best talent to come to Spain in a long long time.
Right now he is said to be injured, I feel like he is not really injured but they are playing a lot of games during a season so maybe Barcelona just wanted to rest him, dude played all year last year and then played at euro during the summer for Spain, and then started the season back up again, he didn't had any proper resting, so during the season he has to be rested and that's why Barcelona is probably doing right now. That's sort of injury too, saying "if I do not rest and play, I will be hurt worse" is injury, resting will make that better and he will get back to playing for club.