No idea where you are but here in the UK nearly all business links come with a static IP at a minimum and leased lines will often have a /29 or /28. Now a sing

No idea where you are but here in the UK nearly all business links come with a static IP at a minimum and leased lines will often have a /29 or /28. Now a single IP (let's go all dewey eyed and forget about other protocols), for TCP, can support more than 65000 ports. OK, let's suppose we are fixated on port 443. Slap a proxy on it. Now you are restricted by the characters in the alphabet (thanks to DNS) ... oh hang on ... you are restricted by UTF8 and company. With Dynamic DNS you don't really need a fixed IP either, provided it has a reasonable lifetime. My Dad's home telephony is on the end of a UK Virgin Media residential connection, which gets you a DHCP assigned but largely unfiltered non RFC1918 address. Their new build at the time offered telephony from BT with no internet or no telephony and internet from Virgin. I ported his phone number from his old house and popped in a RaspPBX and used DDNS to get a stable hostname/unstable IP. A UPS ensures that the Pi stays up reliably. At work, now that unlimited addresses are unavailable, a bit of consolidation is required. I have a HA Proxy that redirects inbound connections based on hostname, URLs and all sorts of things. If your imagination is restricted to only one component that makes up an internet addressable service then sure IPv4 is a bit small. I do understand that getting thousands of services addressable on a single IPv4 is going to involve reading a few manuals. However HA Proxy and co are open source and just require some effort and a bit of hardware. I could go on (at length 8) ...