Being the current and latest Long Term Support kernel officially supported by Manjaro, is kinda a good reason to install it. Not even talking about missing modules sometimes in the latest kernels available, or the issues to be fixed in the ‘latest and greatest’ kernels. Using the LTS kernel is a good way to first not worry about kernel breakage, end of life, issues to be fixed, and is supposedly the current most stable/reliable kernel available to you.
Sure you can benefit from using the ‘latest and greatest’, but that was my point, why would you use something else than LTS, if you can’t answer you probably shouldn’t (it can be better hardware support for last gen video card or CPU, things like that, but I wouldn’t use something else than LTS without proper reason).
Whatever this is off topic now. Next LTS will come when it’s ready, probably this year if it follows the LTS release on kernel.org front page.