I'm going to tell you right now. Zen1 easily outpaces Ivybridge. I rocked my Sandy Bridge for a very long time, but was using a Ryzen 1700x as my server machine. Sandy Bridge @4.8ghz, and fast low latency ram. Pretty much as good as it gets for Sandy. Ivy is not a jump from Sandy Bridge in performance. Ended up replacing the ryzen with an actual Dell Server.
I moved from my 4.8ghz 2600k to my Ryzen 1700x @ 3.8ghz (Pstate OC). It is hands down faster, single thread and massively faster multithread. And this was just first gen ryzen. With a Nvidia 1080ti, the swap was well worth it. Rocking a X370 motherboard, the new BIOS options allow me to move to Zen 3. And the Recent price drops on the Ryzen 5600x look temping, and easily offers high end performance that even Adler lake barely outperforms on most tasks.
So keep your misinformation out of here. Sure Haswell with an OC was a better gaming CPU compared to Zen1, but that faded with time. These days on modern games Haswell shows its limitations more than a 6-8 core Zen 1 does. 4core Intel Chips did not age well into the modern era.
Same with Skylake and Zen 2, Quad Core Skylake is a damn joke. It did not age well, and users got screwed in their upgrade path. Skylake +++ had a higher core count sure, but by this point in time Zen 2 was extremely comparable for gaming performance. Most people don't OC, and if they do it is a light OC. Skylake +++ chips hot super hot and power hungry when pushed hard. Not many did it.
Which is why AMD has been the most recommended CPU provider for new gaming rings since the release of Zen2. Zen2 was close enough for modern games, and the core count boost was worth it. Zen3 was hands down faster than anything Intel had, and it took Intel over a year for Adler Lake. And Honestly Adler Lake is faster, but again not by much. And with the 3DCache AMD more than holds its own. Alder Lake has its use case, The platform will have one more upgrade, even if it is small. AM4 is a dead end, Zen 3 is as good as it will get. If you didn't already have a AMD Setup, and wanted to buy something new. Alder Lake isn't horrible. The Alder Lake i5 is at a great price point.
That being said, Going AM5 will be the best thing you can do as a gamer if you value money and you are looking to upgrade. If AM4 is anything to compare to, it will give you a platform to use for a long time. Unless Intel changes their way, Intel's upgrade path is a joke.
AMD Chips also do very well in Frame Pacing. Sure some of those older Intel chips can still put up some decent min framerates, but the frames overall are all over the place. It does not always make for smooth performance. Even going back to Zen1, The gaming experience was always smooth.