Roomed next door to a dude that played this song, multiple times, every weekend, in 72. While drinking Long Island Bud (he refused to drink Buds brewed in New England (Merrimack Bud)). He'd go nutz over this song. One night he bounced off his bed wrong, hit the concrete block wall and broke his arm. Turned out, he did need a Doctor,

I didn't even know who Peter Frampton was, but I dug this live album.

... in the top 10 list of guitarists.

He was still a kid. He was 19 when he joined HP.
He was about 20 when they recorded this.
There's a few awkward runs (like the one right around 4:18) by today's standards but awfully good for 1970.

Isn't it something that we marveled over the riffs by Hendrix, Clapton, and others. It blew me away, but now any number of kids on YouTube can shame any of them.

I think it started with Stevie Ray. He was astounding and caused many to pick up a guitar and cry the blues.

So the dictionary gets bigger & bigger.
Clapton introduced the long flowing lines mixing fast & slow.
A few years later Hendrix added noise & aggression.
Hendrix disciples like Trower added depth to the harmonic sophistication.
Then Van Halen added a whole new section to the book, and guys like Satriani taked on another layer of harmonic sophistication. Plus, at the same time Knopfler made finger-style & clean cool.
And, that doesn't count the fusion guys.
So guys like Guthrie Govan & Matteo Mancuso were inevitable. They had the textbooks the players just didn't have in 1970.
Continues to evolve, too.