What is your opinion on the idea of all presidents serving one 6-year term?

I saw a post about President Carter saying former presidents he met with supported the idea of single six year terms for presidents. There are some positives to implementing this decision, but also some negatives to consider.

The main benefit, for me, would be that presidents would focus on actually governing instead of reelection campaigns. These days, it seems like reelection campaigns can start the moment a president takes office.

Pros: - more focus on governing than reelection campaigns - less focus on short-term political gains for reelection - limiting consolidation of power - fresh leadership - minimizes lame-duck period effects

Cons: - loss of accountability regarding campaign promises - limited time to implement complex policies/reforms - longer presidency for not-so-great leaders - lack of motivation towards the end of the term

What are your thoughts? Do you have any other different ideas? Would a 5 or 7 year single term work better? Could an amendment like this actually get passed?

Note: I know that this was in the Confederate constitution, which doesn’t exactly add credibility to the idea. Fortunately, the Confederate States were defeated before they could have multiple terms of presidency.