The Debian-Live approach also provides some good opportunities. First and foremost, the very easy remastering makes it efficient to run with no persistent store quite often. For instance, upon remastering, I just start without the store, and the image I run is union-mounted with the persistence file and copied&compressed. Then I have to boot something else to copy the new squashfs image in place, but that's all that has to be done outside the system.
Boot the new image without persistence, create a new persistence file.
For further adaptations, the new persistence file can be mounted in an instance run under kvm, programs can be added and settings tweaked for an eventual new remastering.
Storing the series of squashfs-compressed images, one can always go back in this process if needed.
VINTAGE OEM IBM Three-Button ScrollPoint Optical USB Mouse (P/N:24P0494)-Grade B
$13.45
OEM IBM Thinkpad Keyboard 46H3846
$10.00
OEM IBM Lenovo ThinkPad T20 T21 T22 T23 T24 02K6620 02K6626
$24.99
IBM DOS 6.1 OEM VERSION 5.25" DISKS NEW SEALED
$24.99
IBM Model M Keyboard Flipper and Buckling Spring - Set of 5 - Genuine OEM
$3.49
IBM Keyboard T440 T440s T440p T431s Backlit 04X0139 OEM
$24.00
Genuine OEM IBM Model M2 Keycaps for Missing "Clicky" Keyboard-Keys and springs.
$3.00
IBM Lenovo oem keyboard,Part No 42T3970 FRU# 42T4002
$19.50
IBM OEM DBOA-2720 720MB 2.5" IDE 44-Pin LAPTOP HARD DRIVE HDD Vintage TESTED
$67.90
Lexmark/IBM 6190653 Black Developer (500k Pages), for the Lexmark 3835 printer
$247.98