There's no doubt football has evolved, it's quicker, stronger etc. But the principles are the same, it's attack v defence, but all the players are now bigger and stronger. I mean in essence formations in real terms haven't changed that much, we just call them different things. David Beckham would probably do the same things he did 25 years ago for Manchester United, but would line up at rb not rm. Midfielders are expected to sit a lot deeper now and protect defence more, to compensate, whereas that was more the terrain of fullbacks etc.
The issue is, it's not an onward march to a particular idea set. It becomes cyclical. There have been times when more defenisve innovations have come in, as well as more offensive innovations. There's absolutely nothing to say the next innovations won't be having fullbacks who go back to defending (partly to compensate for more wide forwards essetnially being attackers). From a defensive shape standpoint, it makes a lot of sense.
The stuff about competing is partly true in recruitment, but it's also about how you play. You won't beat Manchester City emulating what they do. They have the best coach in the world to do that, and the most money in the world. Christ knows we've tried it, under successive managers. Unfortunately given our position, we are in the terrain of looking at what others do, and spotting their weaknesses, rather than thinking of a plan ourselves (and to me it's no surprise this is where we've had most "success" under Carlo, as hes good at this).
The only team, outside of the top group to win the league in the past 20 years were Leicester, who sat deep, and hit on the break, while relying a bit on moments of genius from Mahrez. Atletico and Spain much the same. I'm not saying it's the only way to win, but it's probably the most logical option presently.