Wirth's graduate student Michael Franz took this a bit further and adapted to storing Java programs as compressed SSA control flow graphs, called SafeTSA. Franz's research group modified the Jalapeno (now JikesRVM) JVM to be able to load SafeTSA files as well as regular Java class files. They found that the time to JIT code was reduced, and the performance of the generated native code was faster when using SafeTSA. The downside is that SafeTSA isn't well suited to interpretation in a HotSpot style hybrid JIT. So, program start-up time would likely suffer unless using AoT compilation. Last time I played around with A2/Bluebottle/AOS, I believe compressed syntax trees were the on-disk program format.
As an aside, Oberon-2 isn't a C++ alternative because it apparently has mandatory garbage collection, which isn't acceptable to C++ programmers now (which is why they're going to Rust instead of Go) and damned well wasn't acceptable to them in 1997, else they would have moved to Java.
Most think of it as a "basic tinkering and learning" language, and indeed, that is probably the most common application. It does not have to be. 
UNIX came with C, and C became "IT".
The main improvement I see is the implied handling of multiple statements in an if-then-else-end. It seems like it would eliminate a lot of begin/end pairs, so I like it.
Wirth's decision to revert to Case sensitivity was a bad one.
With the exception of replacing "Uses" with "Import", it looks identical to Free Pascal/Delphi.
Oberon-2, a high performance alternative to C++ (1996) - https://news.ycombinator.com/item?id=13734438 - Feb 2017 (2 comments)
A basic forking server in Oberon-2 - https://news.ycombinator.com/item?id=11627697 - May 2016 (36 comments)
Oberon-2, a hi-performance alternative to C++ (1996) - https://news.ycombinator.com/item?id=3361469 - Dec 2011 (18 comments)