Fortunately, unless you're doing hacky bullshit, changing from 32 to 64 bit should be trivial. Unfortunately, companies go out of business, so can't be relied on to update their own software into perpetuity. Fortunately, it probably doesn't have to the original company to update the software, because it should be a straightforward update of some build parameters. Unfortunately, proprietary, source-unavailable code is the norm in commercial software development, so no one but the original company has the source code. Thus it's the original company's fault for not being at least source-available.
Fortunately, we have the technology to run 32 bit software on 64 bit operating systems. Unfortunately Apple has decided to not do so any more. Fortunately, Apple used to allow this, so your software still works on an older version of the operating system. Unfortunately, Apple has decided to brick that version of the operating system, forcing you to update it and lose access to the software you were perfectly capable of running on your device before Apple's unilateral decision. Thus, it's Apple's fault, for breaking backward compatibility and then forcing people to update.
Fortunately, unless you're doing hacky bullshit, changing from 32 to 64 bit should be trivial. Unfortunately, companies go out of business, so can't be relied on to update their own software into perpetuity. Fortunately, it probably doesn't have to the original company to update the software, because it should be a straightforward update of some build parameters. Unfortunately, proprietary, source-unavailable code is the norm in commercial software development, so no one but the original company has the source code. Thus it's the original company's fault for not being at least source-available.
Fortunately, we have the technology to run 32 bit software on 64 bit operating systems. Unfortunately Apple has decided to not do so any more. Fortunately, Apple used to allow this, so your software still works on an older version of the operating system. Unfortunately, Apple has decided to brick that version of the operating system, forcing you to update it and lose access to the software you were perfectly capable of running on your device before Apple's unilateral decision. Thus, it's Apple's fault, for breaking backward compatibility and then forcing people to update.