It is more pronounced because of the term limits. If you establish an arbitrary term limit, It would imply that there is a risk of rupture for long term political planning once the previous leader is out. Therefore, there is this system of the Elder imminence/influence.

I'm also not saying that no term limits is good either. There are drawbacks with a long term ruling leadership such as a stratification and a certain lack of flexibility within the party

TLDR there is no perfect ruling system, it's kind of asking what is better btw a parliamentary system and a presidential system. The key is to have some flexibilities to control the variables