diff --git a/piker/toolz/__init__.py b/piker/toolz/__init__.py
index 4b8a9338..3069504e 100644
--- a/piker/toolz/__init__.py
+++ b/piker/toolz/__init__.py
@@ -28,6 +28,9 @@ from .profile import (
     timeit,
 )
 
+# TODO: other mods to include?
+# - DROP .trionics, already moved into tractor
+# - move in `piker.calc`
 
 __all__: list[str] = [
     'open_crash_handler',
diff --git a/piker/trionics.py b/piker/trionics.py
deleted file mode 100644
index 10f6a33d..00000000
--- a/piker/trionics.py
+++ /dev/null
@@ -1,80 +0,0 @@
-# piker: trading gear for hackers
-# Copyright (C) Tyler Goodlet (in stewardship of piker0)
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-'''
-sugarz for trio/tractor conc peeps.
-
-'''
-from typing import AsyncContextManager
-from typing import TypeVar
-from contextlib import asynccontextmanager as acm
-
-import trio
-
-
-# A regular invariant generic type
-T = TypeVar("T")
-
-
-async def _enter_and_sleep(
-
-    mngr: AsyncContextManager[T],
-    to_yield: dict[int, T],
-    all_entered: trio.Event,
-    # task_status: TaskStatus[T] = trio.TASK_STATUS_IGNORED,
-
-) -> T:
-    '''Open the async context manager deliver it's value
-    to this task's spawner and sleep until cancelled.
-
-    '''
-    async with mngr as value:
-        to_yield[id(mngr)] = value
-
-        if all(to_yield.values()):
-            all_entered.set()
-
-        # sleep until cancelled
-        await trio.sleep_forever()
-
-
-@acm
-async def async_enter_all(
-
-    *mngrs: list[AsyncContextManager[T]],
-
-) -> tuple[T]:
-
-    to_yield = {}.fromkeys(id(mngr) for mngr in mngrs)
-
-    all_entered = trio.Event()
-
-    async with trio.open_nursery() as n:
-        for mngr in mngrs:
-            n.start_soon(
-                _enter_and_sleep,
-                mngr,
-                to_yield,
-                all_entered,
-            )
-
-        # deliver control once all managers have started up
-        await all_entered.wait()
-        yield tuple(to_yield.values())
-
-        # tear down all sleeper tasks thus triggering individual
-        # mngr ``__aexit__()``s.
-        n.cancel_scope.cancel()