Fair point! MagSafe 2 was introduced in 2012. 6 years after MagSafe 1, and 5 years before USB-C. 6 years is double the median lifetime of a laptop in that period IIRC and MagSafe 2 was ditched for a charger that is included on many other devices, so it doesn’t really cause the same churn.
There were 2 physically incompatible magsafes.
Magsafe 2 was made more slender because Apple somehow couldn't imagine that they'd be making an even thinner laptop in the future.
And then the fact that the cable was hard-wired into the wall wart...