Try to read once again what I have written.
The differences in rounding of halv integers - and that is really the only thing where implementations are different - are more or less known.
When I wrote that one can't always trust the last digit, that doesn't mean I don't trust the implementation of the rounding in the different software packages. It means that I don't actually know which kind of rounding (up or down) the different software packages use.
I could even extend that further to human languages. In German we have two words for that - "aufrunden" (round up) and "abrunden" (round down). In Norwegian we usually just use "avrunde" which doesn't give any indications about which way it is done.
So in my personal point of view we still stand where we started.
- Maple does at the moment not have any function to round numbers to a specific number of digits.
- It should have one. There are situations where simply defining how many digits are shown in a result is not enough (see using numbers for indexing of tables, or output to Math Containers, etc.)