Because I used it and there are some problems that might result in image freeze. Explicitely, problems with the debugger byte code to source code mapping or with new class compilation.

And it was not planned to put Opal by default on Pharo because it cannot compile Slang whereas the old compiler can.

But you can switch very easily (Settings >> OpalCompiler)


2013/4/16 Damien Cassou <damien.cassou@gmail.com>
On Tue, Apr 16, 2013 at 1:59 PM, Esteban Lorenzano <estebanlm@gmail.com> wrote:
> Opal is still not default compiler

why not? Don't you think Opal will improve much faster if everyone uses it?

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Damien Cassou
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