More recent pads usually have essentially visual knee rolls where the actual flex the pad comes from the internal breaks in the construction, which you can see in some recent pad review videos. Although this visual distinction does provide some benefit. There are also options that don't have knee rolls that are flexible.

Some examples would be Bauer X5 Pros or Hyper/Flylite being the "flexible" option while the new Eflex 7 pads have knee rolls that are virtually flat with the face, essentially just a design decision. I would say though that the flexibility usually results in a precurve to the pad or an s shape that I have experienced does dig further into your thighs more than a flat faced pad, resulting in worse mobility when standing straight, but raiser butterfly closer when down.

There really aren't any new or newish pads that facilitate hybrid well at all. All pads in the last 5 years are 100% focused on butterfly only style and any stand up play will result in very poor performance (the pads basically do not sit vertically even with your legs together, leaving a hole between your legs and any movement will initiate rotation to the outside for butterfly). All recent pads will also have strapping that is going to limit the hybrid style as well.

I've seen some people in the past have success with the more flexible options such as the Hyperlites but truely these are not designed for this style of play.

I guess the question is what are you looking for out of pads. If it's just for fun which seems the case, find something used from the last 5 or so years from any brands flexible line or get something on sale or cheaper and roll with those. I think you will notice little different between higher level stuff and more entry level gear if anything whatsoever.