IBM bought SoftLayer 5 years ago, and was unable to capitalize on their niche (bare metal). Instead they decided to double down on provisioning VMs, which SoftLayer was never that great at. The set of features IBM's VM's provides compared to any other modern cloud is terrible (headed backwards in Gartner charts). It's barely getting any better, meanwhile Google/AWS/Azure are gobbing on features.
IBM effectively failed in their integration of SoftLayer. They bought SoftLayer but failed to modernize them. Why will RedHat be any different?
Take a look at what's left of SoftLayer today. Most folks who had the necessary skills to keep their ancient php platform relevant have left a long time ago.
I'm sure IBM is on their 5th iteration of their "next gen" VM provisioning system by now, due out any quarter...