Too many languages

There are thousands of programming languages.

The purpose of a programming language is to express programs. The
purpose of learning programming languages is to build up a toolbox for
reasoning about and synthesizing programs in any one given language.

There are diminishing returns on learning programming languages, and
time is scarce.

Therefore one must select between programming languages to study.

A good selection of languages has both
+ breadth
  + satisfies a number of real world economic needs.
+ focus
  + exploits similarity between languages and incremental learning.
  + some unifying basis

A good member of a particular selection meets a number of the
following criteria:
+ Satisfies one particular school of thought on programming languages.
+ Significant difference from predecessors
+ Significant influence on successors
+ Economically significant
+ Advanced i.e. no direct, established and proven heir.
+ A good language.
  + Easy to express programs with
  + Easy to read programs expressed with
  + Easy to reason about programms expressed with

No one of these criteria are sufficient or even necessary conditions.

A bad member satisfies the opposite criteria.

>>103
Suppose this new CPU makes GC as fast as stack allocation
Lol. Do you have any idea how GCs work? How different GCs work? Parallel, refcounting, generational, incremental?

Hardware could just as easily be able to check whenever you access outside an array.
Ok, yeah, you can do that part.

not even a virus or low-level code would be able to break this protection
Lol. Don't confuse bounds checking with memory protection. The first is strictly hardening against buggy code.