that is really a subjective matter.
like somebody said to me... you can't use the PHP to develop an operating system.. 🙂 so this is a limit from that user perspective!
since people don't think alike therefore i just can say
in my perspective,
php syntax and its module structure is really the best from what i see (subjective too) in current programming languages.
if you look at C, C++, em.. i think they reach the limit.
take a loot in current technology, you see the electric right.
since the creation / found of the electric, until now,
em.. i see biotech.. <= perhaps the future of tech.
people keep extending the electric by building more applications around it. But no new creation/found which has the weight like the electric found. i mean core technology. maybe someday somebody will found a new way to generate electricity, using magnetic ?... i don't know.
one thought which just cross my mind is, since the ansi C and C++ was drafted, the technology for mainboard, processor already far ahead from what the language can do with the advance tech.
therefore, there should be a language that optimize the advance hardware knowledge using the new logic.
imagine in the year of 2020, are we still depend C/C++ to code our application ? I really wonder.