If you go forward with the website consolidation process, there’s no need to worry about breaking all your old links. Your old links will redirect appropriately if you use 301 redirects on your new website. Still, you can also use a website consolidation service to ensure that all your links redirect properly.
Website consolidation services sometimes take the website owner’s old website and place it on a new website where it will continue to receive traffic from relevant existing traffic. If this isn’t something you’d like to do with an old website, then you can consolidate websites by starting anew or keeping one of them as is and then removing the other website(s).
Doing these things may result in a flat domain, so be sure to check for this when selecting a website consolidation service. It’s not something you want after going through all this work! You don’t need any distractions in the future.
Retain one website as-is, create another website to replace the ‘old website,’ or redirect all website URLs to one website? The choice is yours.
Website consolidation services can help you choose which website should be kept as-is, which website(s) should be merged into a new website, and which website(s) should have links redirected to a new website. Of course, it’s up to you what happens with your old websites after choosing a service that can merge or redirect your old websites’ contents, but it will save you a lot of stress.