Microsofterol sinan zorlu - https://support.office.com/en-us/article/what-s-new-in-excel-2019-for-windows-5a201203-1155-4055-82a5-82bf0994631f over 2016. The Dynamic Array functions will no doubt be in the next version of Excel (2022 or whatever) but right now it isn't even in Office 365 yet, just insider builds.
That is the problem with the perpetual license. You get what you get for when it was released. My understanding is Excel 2019 is effectively the 1803 build of Excel from Office 365, so what Office 365 users generally had in March of 2018. Then I suppose they spent those 6 months really fixing any bugs in 1803 before slapping the 2019 sticker on it.
It is what Paul Thurrott calls "https://www.thurrott.com/podcasts/windows-weekly/141349/windows-weekly-539-yesterdays-office-tomorrow"
