对于PC_BASE体系更要命的是低档X86的配套芯片都已停产，包括DRAM等，使大家想接着使用386、486、586都不可能了，（我一直很喜欢ICOP的M6117，可惜现在DRAM真是买不到新货，全吃库存了），除非使用旧芯片。同时现在intel和微软已完全放弃了向下兼容的规则，使PC_BASE存在的意义日益减少。没有哪家工控厂商都跟上这两位大佬的更新速度，当你的产品准备面市时，你会发现你使用的所有器件均已停产，你只能上二手市场去买拆机件。
在PC_BASE发展过程中大多数厂商都遇到了PC_BASE单体成本高、需要用户有较强的开发能力的问题，使PC_BASE的量很难做大，对厂商的技术支持的能力和要求很高。为此很多工控机的厂商都找到了像KW、infoteam、ISAGRAF、3S这样的软逻辑开发商，利用工控机或者PC104+IO板卡来组成一个控制平台，这种控制平台大的优点在于可以支持现有PC的各种资源，使监、控可以做在一体，缺点主要是从小型PLC来说，成本太高，从中大型PLC来说点数又太少，同时抗干扰和抗振动方面存在许多架构性问题。
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