There has been a fair amount of just run it under emulation being said.
One of the advantages of DOS is that it isn't a modern operating system.
An easy way to install Freedos safely to a desktop computer involves the

0) Back up all existing systems.

1) Disconnect all existing hard drives.

2) Buy a hard disk to put Freedos on, if you have room for another one
and a place to plug in.

3) Install Freedos to the whole entire hard drive or however you want to
install it, maybe you want to put Linux on there too ;-)

4) Hook all the drives back up.

5) Adjust your bios appropriately.

6) Use BootIT bare metal or grub or something similar to set up booting
for all of your OSes.

Now on a 64 bit computer, Freedos may have to be run under emulation.
A variant of these instructions is to get a PIII or P4 32 bit computer
and dedicate that to Freedos.

The problem with emulation is that you are throwing the simplicity of
DOS away and introducing compatibility issues.  Emulation is getting
better and if you are constantly rebooting between Freedos and Linux or
Freedos and Windows, emulation may be a necessity.  Still, a good KVM
switch and a dedicated DOS computer also solves the reboot issue.
Freedos will work fine on anything from an 8086 up to a Pentium 4.
Don't underestimate the utility of dedicating a computer to DOS.

A thought that comes to mind is that you don't want to worry about your
kids who are interested in playing video games screwing up your
computer.  A dedicated DOS machine makes a lot of sense for that.

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