We absolutely need a modern solution for IFVs or whatever they're being called these days. Dismounted action over any length of time in hot climates just causes a myriad of issues in terms of performance and capability.
For me, Jackal came damn close to being the perfect taxi. You'd man the platform, zoom about the AO, maybe blat a few things from it and then when it came to it, you'd leaguer up and hop out and wander off for a bit, carrying only core fighting kit.
It's an expensive way to go - lots of vehicles required, but in terms of flexibility and increase in capabilities, you're using your men rather than having them squished into the back of an IFV getting carbon monoxide poisoning from the exhaust fumes.
Oh, and more targets too so better spread of risk.
And just a **** ton more fun.