As always, it's not about the need. It's about want, which is guided by personal preference. While I do have a small collection of traditional 1911:s, double stack 1911:s are my preferred range and carry guns. Mainly Para and Caspian platforms, the latter having slightly better ergonomics for my size 10/11 hands. However, 1911 being a traditional pistol, many of those who prefer it over more recent plastic fantastic designs prefer the original single stack configuration. Even though the majority of standard 1911 parts are interchangeable, trigger and mag release differ slightly in all double stack designs and all of them seem to be proprietary.
The "neo-traditionalist" double stack 1911 market is a bit of a niche. Most buyers are either full blown purists or just take the easy double stack route and get a Glock or equivalent. The middle ground is fairly narrow and that's reflected in a limited number of offerings on the market today.