How long will you keep on promoting proprietary software on this forum? All
your points but the speed one (that was properly answered by Loïc) is either
about denying the user her freedom 1 (freedom to study the code executed on
her system) or about denying freedom 3 (the freedom to improve upon the code
and redistribute these improvements). Almost every user of this forum (but
you?) value these freedoms. You are losing your time.
How long will you keep on writing that Free software should surrender because
its opponents (Microsoft, Oracle, Apple, Facebook, Twitter, Google, etc.) are
too strong? The history of free software clearly shows that, starting from
nothing, such large companies can be threatened and even be converted to free
software.
Finally you should search and learn why "security by obscurity" is very bad.
