There are actually two reasons - one very large reason - for keeping FSX DVD; the large one being the SDK, which is crippled (no executable compilers) in Steam Edition, the more minor one is that many installation routines do not and will never be updated to allow installation into FSX Steam Edition. Other than that, SE is patched, updated and performs slightly better than FSX DVD, so is worth having, as more and more add-ons will be released as SE add-ons only. While non-SE content can be installed to SE, SE only content cannot be copied the other way, due to a different file structure and DRM being used to lock it to the platform.
I have both installed and have both non-Steam-specific and SE-only packages installed; the SE-only packages are installed to a "DLC" folder under the FSX installation path and parts of them are compiled in a non-standard way, which the DVD version of FSX cannot read. Unless Baz has come up with a specific deal for this not to happen, the Aztec will be locked to Steam Edition only. From a repainter's perspective, which is where I was approaching it from, the fact that Model Converter X cannot read the SE DRM format of files makes testing repaints a lot harder.
Ian P.
I have both installed and have both non-Steam-specific and SE-only packages installed; the SE-only packages are installed to a "DLC" folder under the FSX installation path and parts of them are compiled in a non-standard way, which the DVD version of FSX cannot read. Unless Baz has come up with a specific deal for this not to happen, the Aztec will be locked to Steam Edition only. From a repainter's perspective, which is where I was approaching it from, the fact that Model Converter X cannot read the SE DRM format of files makes testing repaints a lot harder.
Ian P.