So, I want to write a realistic alternate timeline where people switch to biotechnology in the 21st century, assuming that the technology to make it it already there. I have postulated several reasons as to why people would make such a switch.
I also want to make a plausible tech progression tree.
Here are the reason I have postulated
1: Less power consumption
Despite requiring complex molecules for nutrition and construction of cells, once they are built up, cells consume surprisingly little power when operating, I mean, look at the human brain; a whole computer network of processing power for only twenty watts of power.
Provided you have enough resources, biological constructs can be grown instead of built, despite being initially expensive to make, like silicon chips, their cost would quickly decrease, you might even be able to make improvements to a system in-situ without having to take out as many old components. or conceive an entirely new system for each new generation.
Organisms have an incredible ability to fix themselves or work around existing damage, with good engineering and a robust immune system, they could fight off old age and cancer for potentially forever, assuming auxillary machinery doesn't break down.
4: DNA is a very dense long term information storage medium
Despite being very fragile to disruptions such as radiation and mutation, given adequate built-in redundancy, error compensation systems and shielding, DNA would be an excellent way to store data long-term in a small space,
This would be excellent for interstellar probes and von-neumann machines as space travel demands that every gram counts.
And now, the tough part
I have already wrote a rough technological generation list below, but I'm not sure it's realistic as some technologies might already exist before a given tier;
Here is how technology might progress in my setting...
The First Generation
First generation are made up of crude, prototype systems, based off of animal cell strains, they are prone to cancer and other failures and require delicate and fiddly external support systems, this restricts them to laboratory use
The Second Generation
The second generation is a lot better, using modified animal cells, but still has issues like needing to warm up, they can hibernate, but going completely to sleep is too risky. This generation is more flexible in installation location, but is still bound to a lab environment
The Third Generation
Third generation devices use cells manufactured with composite DNA, and are better interfaced with electronic systems, allowing for better self-management, they also have lower warmup times. Biotechnology is now reliable enough to be sold to the public, albeit a bit more expensive than existing appliances.
The Fourth generation devices can turn themselves off without doing damage and turn themselves back on quickly, they are made out of cells manufactured with entirely synthetic, purpose built DNA and are properly enmeshed with compact and intricate electronic systems. Biotechnology is now widespread, with plenty of knowledge about how to use and maintain it.
Is this tech progression list plausible?