I think that the numbers being floated to accept a sale of Kante were so high (£150-160m plus) that IF PSG did actually toss that kind of cash out there, we would have been mad to not snap it up, especially IF we could have worked out some deal for Mbappe going the other way for another £75m to £100m on top (Neymar was still their solid, locked on the team, number one at the time)
Kante plus £90m or so for Mbappe, well I would have bitten PSG's hands off for that back then (and would do so now)
Kante turns 30 next season
Mbappe turns 22
Mbappe, IMHO, is already the best player on the planet, now that Messi and CR7 are ageing off toward the end of their careers (at least in terms of the insane standard they have set for the last 10 plus years, although Messi will last longer)