Modern V/8's
I believe that crate motors will be around for a long time yet, especially with GM's recent announcement of an $854 million investment in ICE design. Ford has recently launched the 7.3 liter pushrod V8 as a crate motor as well and it seems to make some decent power, somewhere north of 440hp and torque in N/A form.
Like many others here I have no interest in all electric vehicles, unless it's a golf cart.