You're right with hardware there are end of life notices that extend for several years. And even third parties that support the equipment. (Of course the software or OS might be a different story.)
But more importantly there is an ongoing concern that has a reputation (not the same with an entire company folding) and the product killed is just a part of many products that are offered. And of course they are charging for something whereas in the case of web startups what they are giving you is free. So there is no "consideration" and as a result I would think they are not subject to any class action lawsuits. How can you sue for something you didn't pay for?
But more importantly there is an ongoing concern that has a reputation (not the same with an entire company folding) and the product killed is just a part of many products that are offered. And of course they are charging for something whereas in the case of web startups what they are giving you is free. So there is no "consideration" and as a result I would think they are not subject to any class action lawsuits. How can you sue for something you didn't pay for?