diff --git a/documentation/content/en/articles/committers-guide/_index.adoc b/documentation/content/en/articles/committers-guide/_index.adoc
--- a/documentation/content/en/articles/committers-guide/_index.adoc
+++ b/documentation/content/en/articles/committers-guide/_index.adoc
@@ -3648,12 +3648,12 @@
 The FreeBSD Project provides no guarantees to consumers of Tier 3 platforms and is not committed to maintaining resources to support development.
 Tier 3 platforms may not always be buildable, nor are any kernel or userland ABIs considered stable.
 
-=== Tier 4: Unsupported Architectures
+=== Unsupported Architectures
 
-Tier 4 platforms are not supported in any form by the project.
+Other platforms are not supported in any form by the project.
+The project previously described these as Tier 4 systems.
 
-All systems not otherwise classified are Tier 4 systems.
-When a platform transitions to Tier 4, all support for the platform is removed from the source and ports trees.
+After a platform transitions to unsupported, all support for the platform is removed from the source, ports and documentation trees.
 Note that ports support should remain as long as the platform is supported in a branch supported by ports.
 
 === Policy on Changing the Tier of an Architecture
diff --git a/website/content/en/platforms/_index.adoc b/website/content/en/platforms/_index.adoc
--- a/website/content/en/platforms/_index.adoc
+++ b/website/content/en/platforms/_index.adoc
@@ -17,10 +17,10 @@
 |Platform Name |TARGET_ARCH |11.x link:{committers-guide}#archs[Support Tier] |12.x link:{committers-guide}#archs[Support Tier] |13.x link:{committers-guide}#archs[Support Tier]
 |64-bit x86 |link:amd64[amd64] |Tier 1 |Tier 1 |Tier 1
 |32-bit x86 |link:i386[i386] |Tier 1 |Tier 1 |Tier 2
-|PC98 |link:pc98[pc98] |Tier 2 |Tier 4 |Tier 4
+|PC98 |link:pc98[pc98] |Tier 2 |Unsupported |Unsupported
 |64-bit ARMv8 |link:arm[aarch64] |Tier 2 |Tier 2 |Tier 1
-|32-bit ARMv4/5 |link:arm[arm] |Tier 2 |Tier 2 |Tier 4
-|32-bit big-endian ARM |link:arm[armeb] |Tier 2 |Tier 4 |Tier 4
+|32-bit ARMv4/5 |link:arm[arm] |Tier 2 |Tier 2 |Unsupported
+|32-bit big-endian ARM |link:arm[armeb] |Tier 2 |Unsupported |Unsupported
 |32-bit ARMv6 |link:arm[armv6] |Tier 2 |Tier 2 |Tier 2
 |32-bit ARMv7 |link:arm[armv7] |<<n-armv7,*1>>|Tier 2 |Tier 2
 |32-bit MIPS soft-float |link:mips[mips, mipsel] |Tier 3 |Tier 2 |Tier 2
@@ -32,7 +32,7 @@
 |32-bit PowerPC with SPE |link:ppc[powerpcspe] | |Tier 2 |Tier 2
 |64-bit PowerPC |link:ppc[powerpc64] |Tier 2 |Tier 2 |Tier 2
 |64-bit RISC-V |https://wiki.freebsd.org/riscv[riscv64, riscv64sf] | |Tier 3 |Tier 2
-|64-bit SPARCv9 |link:sparc[sparc64] |Tier 2 |Tier 2 |Tier 4
+|64-bit SPARCv9 |link:sparc[sparc64] |Tier 2 |Tier 2 |Unsupported
 |===
 
 === Notes