Executable files pretty much have the most rights of any file in the receiver.
Running multiple executable files at the same time may cause issues or problems that would not normally be seen.
Some common executable files in the enigma2 receiver are:
WEBif
NTP Time
Blindscan

The Mio/Mio+ receivers could be considered to be miniature computers. The Mio/Mio+ receivers do not have a complete set of resources that would be found on the average home computer. The user that limits the amount of executable files being ran at one time may have less problems as compared to the user running multiple files that are executable. Here are the permissions of the 3 common executable files mentioned above:
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[Only registered and activated users can see links. ]

Your console output will look like this when polling the webif every 3 seconds:
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab
[eConsoleAppContainer] Starting /usr/bin/grab

Let's say we start a blindscan while the webif is polling every 3 seconds. Then we have 2 executable files running.
Let's say the time is set to poll every five minutes, and it polls in the middle of the blindscan. Then we would have 3 executable files running for a short period.

Users that have the least amount of executable files running at the same time can be expected to have less issues or problems when compared to users that run multiple executable files at the same time. Blindscan is a fragile process, and it does not take much to disrupt it.

If you understand how your receiver works and use good judgement, you should have less problems or issues with it.