Diego Simeone has been managing Athletico Madrid for nearly 700 or so games if I am not wrong, which is quite a lot and something we do not see that often anymore, because most teams just change their managers like they are changing a sock so we do not get to see this many teams with the same manager all that often.
I think Atalanta had the same thing as well and they have seen the results of that too. In the end, I believe that we are going to end up with something different eventually, because Diego Simeone can't keep on managing Athletico Madrid for another 10 seasons, eventually something will change. Plus he is the highest paid manager in the world, that will not be fine with the team eventually, they may one day say lets fire him, get someone cheaper and use that money to get better players.
Spain is a very tough season and it takes only the strong to survive here in La Liga. Real Madrid, Barcelona and Atletico Madrid have been the major club to make it to the UEFA Champions League without challenges because they're equipped with the basic necessities of fierce strength, always ready to make good runs for major titles.
Diego Simeone is the main tough coach that handed Atlético Madrid with confident, he's always upfront and solved the major barrier on their way. He's been with the club for years and have always been the major pillar standing behind the success of the club, he do deserves some accoaldes.