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Hi Great  question. Google stopped looking at IP address about two years ago. I  am sure that there IP wasn’t that factor for SEO unless they where on a PBN or it was over two years ago. Many very large sites use CloudFlare or something else like it I personally would recommend Fastly if you want something that with shrink images & work like CloudFlare but do the things that only CloudFlare Enterprise a $5,000 a month offering can do. I don’t know you’re server config but I know time after time Fastly has been much faster then CloudFlare https://www.fastly.com/ https://www.CloudFlare.com Lastly I do want to CloudFlare has gotten a bad name because they do not  regulate who or what content is allowed on there platform  booters use them to attack & to prevent DDOS attacks. With a platform that this has lead to there IPs being listed as spam so I have seen a case when I used. 9.9.9.9 or IBMQuad9 as reclusive DNS where I could not see a CloudFlare site because one ip was listed as spam & 9.9.9.9 just shows a 500 error it was fixed when I changed my local DNS to a dns system that didn’t block spam IPs. this also only happened once so it is very unlikely to happen to you. https://www.fastly.com/ https://www.CloudFlare.com Change in IP, or possible sharing of Its with PBNs / bad Neighborhood’s, can really hit search rankings but it is very unlikely that google will think that is your domain if the IP is dynamic like CloudFlare . it not going to hurt you because google looks at domains not IPs now. but this is not something I would worry about from CloudFlare it cleans IPs so if you get one you will have a new one sooner if you tell them also the business & Enterprise plans are much cleaner the the free plan this is just one more reason https://www.fastly.com/ But the short answer is yes it’s safe to use. do you mind telling me what you’re hosting setup is now & who you host with? Hope I have been of help, Tom