What if instead of exiting the model in VB/VM which does cause problems, we instead save the machine state? I have been experimenting for the last four days and it has so far caused no problem. Another advantage, on restart we do not have to start from the last trickle. I do not know exactly, any feedback?

Makes sense to me - the equivalent of suspend or hibernation in a machine that is not using virtualisation. - That has never lost me a task compared with shutting down and re-starting which loses me between one in ten and one in twenty tasks on average when I do it.

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The tasks are also running faster. It does not fall back to the last checkpoint which it does with a re-start.
I have a question. Single Board Computers. they do not cost much and run on some flavour of Linux. Speed can be from 1.26 GHertz to boost 2 GHertz.
CPU's onboard can be anywhere from four main and some minor running at slower clock speeds.
Here are the Specs for Raspberry 4.
Specifications
Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz
2GB, 4GB or 8GB LPDDR4-3200 SDRAM (depending on model)
2.4 GHz and 5.0 GHz IEEE 802.11ac wireless, Bluetooth 5.0, BLE
Gigabit Ethernet
2 USB 3.0 ports; 2 USB 2.0 ports.
Raspberry Pi standard 40 pin GPIO header (fully backwards compatible with previous boards)
2 × micro-HDMI ports (up to 4kp60 supported)
2-lane MIPI DSI display port
2-lane MIPI CSI camera port
4-pole stereo audio and composite video port
H.265 (4kp60 decode), H264 (1080p60 decode, 1080p30 encode)
OpenGL ES 3.1, Vulkan 1.0
Micro-SD card slot for loading operating system and data storage
5V DC via USB-C connector (minimum 3A*)
5V DC via GPIO header (minimum 3A*)
Power over Ethernet (PoE) enabled (requires separate PoE HAT)
Operating temperature: 0 – 50 degrees C ambient
* A good quality 2.5A power supply can be used if downstream USB peripherals consume less than 500mA in total.
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Can we run Climate WU's? Drape them all in front of the air-conditioning outlet. Anyway, at max 8GB's of RAM we might get away with three WU's.
There are some SBC's with M.2 slot. A video card can be run with an alternative power supply. You need an adapter cable. 16x

I don't think they will run on an ARM processor.

I don't think they will run on an ARM processor.

That is my understanding too but I did wonder if they would run the OpenIFS tasks. I am thinking of getting one and if I do before the next testing batch comes along will see if I just get the message about no tasks for my type of processor. (With them, you would likely only be able to run one at a time because of the memory requirements.