I think that people will always use these because "to each his own".
Developers will realize that as of 0.20, it is trivial to make your own module in C++ (no more .def files, explicit attachment code), and then link it to your own AMX plugins. Essentially you can write AMX and Metamod plugins in C++ now as modules, which gives developers a great environment - the power of C++ and the simplicity of AMX Small.
The original AMX was not designed with much scability, this is something we have finally changed with AMX Mod X 0.20. I hate to say it, but a lot of the problems with AMX come from the original author's coding habits (which, well, they're not our style). Many of the changes have been simply rewriting parts from scratch. So much has changed that the cores are really no longer comparable - the 0.20 core is greatly superior to AMX 0.9.6j+.
I don't see Admin-Mod and ClanMod as competitors, it's all up to the user (and I have exchanged ideas with the AM dev team often, as did OLO). As long as we have the community-oriented development that we have now, the project has succeded
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