The only advantage of this unit is if the extrication was inaccessible to available truck-mounted hydraulic units.
A gas powered portable system might be unwieldy to carry to a remote scene, but it can be done.
All our cutters/spreaders are portable gas units.
Also, there are battery-powered extrication tools that would be better than this - they provide a gradual and controlled action rather than an all full power or nothing approach.
IMO, this type of cutter would be best suited for small volume scrap yards