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All of these versions of TeX are just extensions of the original TeX. The core Knuth's code is still used in each one of them. The stability comes from the core
by coliveira 15y ago
All of these versions of TeX are just extensions of the original TeX. The core Knuth's code is still used in each one of them. The stability comes from the core, not just from the work of pdftex, xetex and luatex developers.
- patrickg 15y agoThe stability comes from the core, but the problems arise from the extensions. I have pushed LuaTeX to some limits and seen lots of segfaults and other errors.