by Ken Task.
Have not used Akeeba Solo, but read about. Uhhhh ... that's not free, is it? A php script run from web, right? Prefer to keep scripts/apps to a minimum cause they all are potential holes and one needs to keep up with the updates for all.
A web based backup on some sites that are large isn't as efficient nor as fast as cli.
Use linux for server so for backups the tools that come with the OS (like tar, mysqldump) are the same on all 'flavors' of Linux. As far as 'migration' of files to another server, 'scp' is also on every Linux flavored boxen and can talk to new Linux host.
We are all free to choose our own 'poison', however!
'spirit of sharing', Ken