Yes, with "servers or clients that don't facilitate any form of IPv6" being a pretty good description of "the internet at large".

For someone providing content (websites, applications, internet-based software, etc) there is a need to support both IPv4 and IPv6 clients for a while.

For most consumers IPv6 will already work on many sites, and I expect that to increase considerably over the next 1-2 years.

If you want to query some services (such as Google Search or Google Maps API), you may encounter throttling issues.

Having multiple IPv4 addresses helps to alleviate that problem.

IPv4 address also has reputation attached to it. That reputation is much move valuable that reputation on IPv6 address, because cost of IPv6 is pretty much zero, but IPv4 costs $10+ per address.