Not a chance that moves the needle for Matthews. 20 other teams would beat that offer easily, and I'm sure the Leafs are getting top prospects and 1sts if Matthews is ever made available.
Regarding their core 4, I am not a fan at all of teams rewarding young guys so early in their careers. Bobby Orr mentioned something related in his book I read a little while ago, that he's concerned with young guys making so much money too early in his career. I'm sure that for some guys it doesn't make a difference, but it makes you wonder if it takes away some of the hunger that younger players should have. These guys were treated like superstars before they really, truly earned the title. Obviously they are super skilled, but when the fans and media are pumping you up from the age of 20-22 I wonder what effect that has on a player's attitude, work ethic, etc.
From a cap perspective I can see why teams want to lock young guys in early, but from a psychology point of view I don't like it. Hell, Toronto could have still paid Matthews and Marner a lot of money without going as high as they did, not to mention allowing them to hit free agency so early. Did the Leafs really have so little leverage that they had no choice but to give those deals out to Matthews and Marner when they did? Then, as a result, they had to pay Nylander more, maybe even JT. Plus, those huge deals no doubt hampered their ability to improve the team's depth. Seems like Toronto management really mishandled those guys early on and they are still paying for it now. I guess this is more suited for the around the NHL thread, but I'm just following your comment.