Technically, nothing keeps us from having engine electronics with a degree of reliability acceptable for light/general/recreational aviation. And that would be a great improvement. Yet there is none on the market today, the development would be expensive and there is but little sales volume to make up for it.
For lack of anything better, we make do with automotive electronics, which have good reliability when compared to traditional automotive electrical systems, but aren't really good enough for us fliers.
For one example, I understand Rotax 4-strokers are often (or even as a standard?) equipped with electronic ignition from Ducati motorbikes.