Me 3. My A7s has a much worse and much less accurate focus peaking than my 60D with Magic Lantern. Especially that magic stuff called Digic Peaking, lord that makes manual focus A BREATHE
Nonetheless, most of Canon DSLR users are set on AF and I guess that's why Canon has ''forgotten"? peaking feature? But then again, not only as you list Manual focus-only lenses, but actually for video users, all Canon EF Mount glass must be used in manual focus mode so add a 100 to these five if you count video in. Canon engineers, software developers, feedback observers, marketing departments, are less than probable to "forget" the Peaking feature. Especially since they did just add it on the M3 and M5.
It does not cost or takes hardware power at all (based on ML Peaking, that is, which is better than most peaking I've seen, only bettered by f5 and C100II's EVF peaking)
So it's on their mind, doesn't cost them, checks a feature box and a spec line to add, what gives?
Just does NOT make since why at least the latest Canon DSLRs (80D - 5DSR - 5DIV - 1DXII) Don't have a little On/Off focus peaking icon in liveview mode.
Since I've bought my first M42 to EF adapter, I have more manual glass in my posession, and use more manual glass in actual shooting, than Canon EF lenses. These old russian primes from the 50's and 60's that cost nothing are simply GORGROUS. Shame I have no peaking on my Canons which have no ML (My 1100D has ML but my 1200D does not. 1300D, 750D, 760D/T6s, 80D, 7DII, 5Ds, 5DsR, 5DIV 1DXII all have no ML thus no peaking. Virtually all Canon current line up except for the still in-production T3/1100D, 70D, 6D and 5DIII kits still on sale.