Drawbacks of Using C++ / C# for PC-Based Equipment Control
Eleven real-world drawbacks of building PC-based automation control software in general-purpose languages like C++ / C# — senior-developer dependency, long development cycles, no runtime edits, painful handovers.
Most PC-based automation equipment is still controlled with general-purpose languages like C++ and C#, built in Visual Studio. In practice this approach has a long list of real-world problems — and those problems are why many machine builders struggle to hire and retain control-software engineers.
You need experienced senior developers
C++ and C# are highly abstracted languages with a lot of moving parts. Using them effectively takes substantial experience and knowledge — the learning curve is steep, especially for newcomers. So your team needs senior engineers, period.
Development takes a long time
C++ and C# require a lot of work to extract even modest performance gains. That stretches the schedule.
Wide quality variance based on developer skill
The quality and efficiency of the code depend heavily on individual experience. Two engineers on the same project can produce drastically different results.
Tooling and language fragmentation makes management hard
C++ and C# use different toolsets and libraries. Inconsistencies emerge across team members, and project management gets harder.
Even with the source, it's hard to read
Both languages are structurally complex. When the equipment's source code is also tangled, analysis becomes considerably harder.
Lack of an integrated framework
Without a unified framework for PC control, developers have to assemble several libraries and tools — and that increases overall development complexity.
Sequence edits during machine operation are hard (no live runtime edits)
C++ and C# are not friendly to changing code at runtime. While the machine is running, modifying sequences is difficult — which limits flexibility.
Debugging during operation is hard
When you can't debug live, you can't fix problems in real time, which hurts both performance and stability.
Hiring is hard
C++ and C# aren't easy languages, and engineers who use them effectively are relatively scarce. Finding the right person takes time.
Higher developer costs
Because effective C++/C# engineers are scarce, labor costs go up.
Knowledge transfer becomes painful
Complex code is hard to hand over. When developers leave or teams change, projects slow down and incur extra cost.